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Results for "

Colorimetric

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Beta-lactamase (1) Biochemical Assay Reagents (21) Caspase (3) Dopamine β-hydroxylase (2) Drug Intermediate (1) Elastase (1) Endogenous Metabolite (1) Environmental Pollutants (1) Epoxide Hydrolase (1) Fluorescent Dye (37) Glycosidase (1) Isotope-Labeled Compounds (1) Lipase (2) MOFs (2) Phosphatase (1) Photosensitizer (1) Poly(ADP-ribose) Glycohydrolase (PARG) (2) Reference Standards (3) Ser/Thr Protease (3) Thrombin (1)
By Research Areas:	Cancer (4) Infection (5) Inflammation/Immunology (1) Metabolic Disease (8) Neurological Disease (5)

By Targets:

Beta-lactamase (1)

Biochemical Assay Reagents (21)

Caspase (3)

Dopamine β-hydroxylase (2)

Drug Intermediate (1)

Elastase (1)

Endogenous Metabolite (1)

Environmental Pollutants (1)

Epoxide Hydrolase (1)

Fluorescent Dye (37)

Glycosidase (1)

Isotope-Labeled Compounds (1)

Lipase (2)

MOFs (2)

Phosphatase (1)

Photosensitizer (1)

Poly(ADP-ribose) Glycohydrolase (PARG) (2)

Reference Standards (3)

Ser/Thr Protease (3)

Thrombin (1)

By Research Areas:

Cancer (4)

Infection (5)

Inflammation/Immunology (1)

Metabolic Disease (8)

Neurological Disease (5)

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Peptides

MCE Kits

Natural
Products

Isotope-Labeled Compounds

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-15924

Thiazolyl Blue Maximum Cited Publications 182 Publications Verification MTT; Thiazolyl Blue Tetrazolium bromide; Methylthiazolyldiphenyl-tetrazolium bromide	Fluorescent Dye	Others
Thiazolyl Blue (MTT) is a cell-permeable and positively charged tetrazolium dye that is used to detect reductive metabolism in cells. Thiazolyl Blue is taken up by cells through the plasma membrane and then reduced to formazan by intracellular NAD (P) H-oxidoreductases. Thiazolyl Blue is frequently used in colorimetric assays to measure cell proliferation, cytotoxicity, and apoptosis .

HY-137805

Ferrozine 3 Publications Verification	Fluorescent Dye	Others
Ferrozine is a spectrophotometric reagent for iron ions, can react with divalent Fe to form a stable magenta complex species. The complex has an absorption peak at 562 nm . Ferrozine-based colorimetric assays can quantify iron in cells

HY-W115718

Cuprizone 3 Publications Verification	Dopamine β-hydroxylase	Neurological Disease
Cuprizone is a copper chelating agent that forms a deep blue copper ketone complex with copper (II). The copper ketone reaction can be used in colorimetric tests for the presence of trace copper. Cuprizone can be used to induce some schizophrenia-like behavior in mice. Cuprizone acts on copper enzymes, including SOD1, cytochrome oxidase, and DβH, thereby causing oxidative stress and increasing DA levels in certain brain regions such as the medial prefrontal cortex (PFC) .

HY-W034953

Bathocuproine disulfonate disodium 2 Publications Verification	Biochemical Assay Reagents	Others
Bathocuproine disulfonate disodium (BCS) is an organic compound used as a highly sensitive colorimetric reagent for copper ions in biochemical and analytical applications. It has a bright yellow color and absorbs light at specific wavelengths, so it can be used to detect and quantify trace copper. In biochemical applications, BCS is commonly used to study the role of copper ions in various biological processes. Copper is an essential nutrient for many organisms, but it can also be toxic in high concentrations, so accurate measurement of copper levels is important to understand its impact on living systems. In terms of analysis, BCS is often used in environmental monitoring and water quality testing to detect copper pollution. It can detect copper even at very low concentrations, making it an invaluable tool for identifying potential sources of pollution and assessing the impact of industrial activities on aquatic ecosystems.

HY-W009694

3,5-Dinitrosalicylic acid	Biochemical Assay Reagents	Others
3,5-Dinitrosalicylic acid the derivative of salicylic acid. 3,5-Dinitrosalicylic acid is used in the α-amylase assay, carbohydrase assay, and for the colorimetric determination of reducing substances .

HY-15926

ONPG Maximum Cited Publications 6 Publications Verification 2-Nitrophenyl β-D-galactopyranoside	Biochemical Assay Reagents	Others
ONPG is a colorimetric and spectrophotometric substrate for detection of β-galactosidase activity.

HY-15920

INT 3 Publications Verification Iodonitrotetrazolium chloride; p-Iodonitrotetrazolium Violet	Biochemical Assay Reagents	Others
INT (Iodonitrotetrazolium chloride) is a biochemical reagent mainly used in the iodonitrotetrazolium chloride (INT) colorimetric method to assess the metabolic activity of cells and the activity of enzymes .

HY-77962

2-Thiobarbituric acid	Biochemical Assay Reagents	Others
2-Thiobarbituric acid is a commonly used colorimetric reagent for the detection of malondialdehyde (MDA), a marker of lipid peroxidation. 2-Thiobarbituric acid forms a complex with MDA that can be quantified by colorimetric detection at 532 nm as a measure of lipid peroxidation .

HY-D1224

Chlorophenol red-β-D-galactopyranoside 2 Publications Verification CPRG	Biochemical Assay Reagents	Others
Chlorophenol red-β-D-galactopyranoside (CPRG) is an efficient and sensitive chromogenic substrate for β-galactosidase (HY-P2869), widely used in colorimetric assays. Chlorophenol red-β-D-galactopyranoside itself appears pale yellow. When it is specifically hydrolyzed by β-galactosidase, it releases chlorophenol red. The released chlorophenol red turns purple-red under alkaline or neutral pH conditions. This color change from yellow to red can be quantitatively detected at wavelengths of 540-572 nm using visible spectrophotometry .

HY-B1306

4-Aminohippuric acid 4 Publications Verification p-Aminohippuric acid	Others	Neurological Disease Metabolic Disease
4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

HY-15909

BCIP BCIP p-toluidine salt; X-phosphate p-toluidine salt	Fluorescent Dye	Others
BCIP(BCIP p-toluidine salt; X-phosphate p-toluidine salt) is an artificial chromogenic substrate used for the sensitive colorimetric detection of alkaline phosphatase activity .

HY-W013168

4-Nitrophenyl palmitate 4-Nitrophenyl hexadecanoate; p-Nitrophenyl Palmitate; pNpp	Lipase	Others
4-Nitrophenyl palmitate (4-Nitrophenyl hexadecanoate) is a chromogenic substrate for lipases and esterases. Upon enzymatic hydrolysis, 4-Nitrophenyl palmitate releases p-nitrophenol, which can be quantified by colorimetric detection at 410 nm as a measure of enzymatic activity. 4-Nitrophenyl palmitate is used to characterize the activity of various bacterial and mammalian enzymes, including those from Burkholderia and porcine pancreatic lipase .

HY-W129633

2,6-Dichlorophenolindophenol sodium hydrate 1 Publications Verification DCIP sodium hydrate; DPIP sodium hydrate	Biochemical Assay Reagents	Others
2,6-Dichlorophenolindophenol (DCIP; DPIP) sodium hydrate is a redox chromogenic indicator with a redox potential of +217 mV relative to SHE, and it acts as a substrate for reduction reactions. During the metabolic process of nutrient consumption by Saccharomyces cerevisiae, 2,6-Dichlorophenolindophenol sodium hydrate is reduced from dark blue to colorless, resulting in a decrease in absorbance. 2,6-Dichlorophenolindophenol sodium hydrate is widely used in spectrophotometric biochemical oxygen demand determination and preclinical colorimetric toxicity analysis for heavy metal ion detection based on Saccharomyces cerevisiae .

HY-D0221

2,4,6-Tri-2-pyridinyl-1,3,5-triazine NSC 112125; 2,4,6-Tipyidyl-s-tiazie	MOFs Fluorescent Dye	Others
2,4,6-Tri-2-pyridinyl-1,3,5-triazine (NSC 112125) is a colorimetric reagent for detecting iron. 2,4,6-Tri-2-pyridinyl-1,3,5-triazine forms a complex with Fe (II) and can be quantified as a measure of iron concentration by colorimetric detection at 594 nm .

HY-125815

Reactive Blue 4 3 Publications Verification	Fluorescent Dye	Others
Reactive Blue 4 is an anthraquinone dye used extensively in the textile industry. Reactive Blue 4 is a single colorimetric chemosensor for sequential determination of multiple analytes with different optical responses in aqueous media .

HY-151644

Fluorescein hydrazide 1 Publications Verification	Fluorescent Dye	Others
Fluorescein hydrazide is a sensitive fluorescent probe for Hg ²⁺ and Co ²⁺ that induces obvious color changes and fluorescence changes. Fluorescein hydrazide can be prepared by the reaction of fluorescein and hydrazine. Fluorescein hydrazide exhibits an excitation wavelength of 508 nM and an emission wavelength of 531 nM [2][3].

HY-131409

D-Val-Leu-Lys-pNA dihydrochloride D-Val-Leu-Lys-p-itoailide dihydrochloride; D-VLK-pNA dihydrochloride; S 2251 dihydrochloride	Fluorescent Dye	Others
D-Val-Leu-Lys-pNA (D-Val-Leu-Lys-p-nitroanilide) dihydrochloride is a chromogenic peptide substrate that serves as a characteristic substrate for plasmin and plasminogen. D-Val-Leu-Lys-pNA dihydrochloride acts as a sensitive substrate for the DFE27 serine protease derived from Bacillus subtilis DC27. Catalyzed by plasmin, D-Val-Leu-Lys-pNA dihydrochloride binds and hydrolyzes to release p-nitroaniline (pNA), which can be detected colorimetrically at 405 nm as a measure of fibrinolytic activity .

HY-P3236

N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide Ac-IEPD-pNA	Ser/Thr Protease	Cancer
N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide (Ac-IEPD-pNA) is a colorimetric peptide substrate of granzyme B that allows accurate measurement of granzyme B activity .

HY-W115738

PAR	Biochemical Assay Reagents	Others
PAR is an azo dye widely used as a colorimetric reagent for metal ions. PAR forms stable chelates with different metal ions. PAR can also complex with heavy metal ions in polar organic solvents, such as ethanol .

HY-Y0699

Methyl red	Environmental Pollutants Fluorescent Dye	Others
Methyl red is a pH-sensitive acid-base indicator and colorimetric reagent with a pKa of 5.1. Methyl red achieves visual judgment of the titration endpoint through reversible structural changes of protonation (red, pH <4.4) and deprotonation (yellow, pH >6.2). Methyl red is widely used in acid-base titration in chemical analysis and buffer pH monitoring in biochemistry .

HY-D0202

Arsenazo III	Fluorescent Dye	Others
Arsenazo III is an azo derivative of chromotropic acid, a metal chrome dye, a chelating agent, and a cation complexing agent. Arsenazo III forms stable 1:1 complexes with Ca ²⁺, Mg ²⁺, Sr ²⁺, Ba ²⁺, K ⁺, and Na ⁺, and its binding affinity for Ca ²⁺ depends on pH, alkali metal cation concentration, and buffer parameters. Arsenazo III serves as a colorimetric indicator for micromolar ionized Ca ²⁺ in cells .

HY-W011654

4-Aminophenyl-β-D-galactopyranoside, 98% 4-Aminophenyl-beta-D-galactopyranoside, 98%	Glycosidase	Inflammation/Immunology Cancer
4-Aminophenyl-β-D-galactopyranoside, 98% is a highly efficient substrate for β-galactosidase. It is specifically hydrolyzed by this enzyme to release galactose and electroactive p-aminophenol. 4-Aminophenyl-β-D-galactopyranoside, 98% is widely used in colorimetric and electrochemical assays for detecting β-galactosidase activity and determining enzyme kinetics, such as in biosensing fields including cellular senescence, pathogen and contaminant detection. In addition, since β-galactosidase is often overexpressed in primary ovarian cancer, 4-Aminophenyl-β-D-galactopyranoside, 98% can also be applied to related research on primary ovarian cancer .

HY-15929

TBHBA 1 Publications Verification 2,4,6-Tribromo-3-hydroxybenzoic acid	Biochemical Assay Reagents	Others
TBHBA (2,4,6-Tribromo-3-hydroxybenzoic acid) is a chemical colorimetric agent and nanomaterial surface modifier. TBHBA can react with some oxidants (such as H₂O₂) to generate high-absorbance quinoneimine dyes, which enhance the sensitivity of HDL cholesterol enzymatic determination. TBHBA can be used as a bromine-containing coupling agent to modify the surface of silica nanoparticles through esterification reaction. Thereby, organic flame retardant groups are introduced to improve the thermal stability and flame retardant properties of nanocomposites. TBHBA can be used in clinical biochemical testing (such as serum lipoprotein analysis) and the preparation of flame-retardant polymer nanocomposites .

HY-D1599

Rhodamine 6G hydrazide R6GH	Fluorescent Dye	Others
Rhodamine 6G hydrazide (R6GH) is a fluorescent dye. Rhodamine 6G hydrazide can be used in selective colorimetric and fluorescent sensing .

HY-D0943

Nuclear Fast Red Kernechtrot	Fluorescent Dye Photosensitizer	Others
Nuclear Fast Red, an anthraquinone dye, is commonly used in conjunction with an excess of aluminum ions as a red nuclear counterstain. Nuclear fast red has been used as a histochemical and colorimetric reagent for calcium . Nuclear fast red as highly sensitive "off/on" fluorescent probe for detecting guanine .

HY-W011911

L-Leucyl-4-nitroanilide	Biochemical Assay Reagents	Others
L-Leucyl-4-nitroanilide is a colorimetric substrate for leucine aminopeptidase assays.

HY-W110793

Dithizone Diphenylthiocarbazone	Biochemical Assay Reagents	Metabolic Disease
Dithizone can be toxic to pancreatic islet cells and cause experimental diabetes. Dithizone can be used for in vitro in vivo staining of transplanted islets and cytoplasmic granules of bone marrow cells. Dithizone can be used as a chelating agent and colorimetric indicator for the detection and extraction of various heavy metals, including lead and mercury, in analytical and biochemical applications. Dithizone forms stable colored complexes with metal ions and can be quantitatively analyzed by methods such as spectrophotometry .

HY-D2329

Fluorescein-PEG4-NHS ester	Fluorescent Dye	Others
Fluorescein-PEG4-NHS ester is a colorimetric probe formed by the reaction of adipic dihydrazide and fluorescein isothiocyanate .

HY-D0813

Zincon sodium	Fluorescent Dye	Others
Zincon sodium is an excellent colorimetric reagent for the detection of zinc and copper ions in aqueous solution. Zincon sodium can be used for the determination of zinc, copper, and cobalt ions in metalloproteins .

HY-W009454

Potassium p-nitrophenyl sulfate 4-Nitopheyl Sulfate potassium	Fluorescent Dye	Others
Potassium p-nitrophenyl sulfate (4-Nitophenyl Sulfate potassium) serves as a chromogenic substrate for arylsulfatases. Potassium p-nitrophenyl sulfate releases nitrophenol under the cleavage action of arylsulfatases, and the activity of arylsulfatases can be quantitatively determined via colorimetric detection at 400 nm. Potassium p-nitrophenyl sulfate is commonly used in enzyme inhibition assays and metabolite analog-related studies .

HY-W127790

Bathophenanthrolinedisulfonic acid disodium	Biochemical Assay Reagents	Others
Bathophenanthrolinedisulfonic acid disodium salt (BPS) is a colorimetric reagent for iron detection, with a wavelength of 535 nm for iron complex. It can be used for iron determination in aqueous solution systems without the need for extraction solvents. BPS can serve as a precursor to prepare Europium(III) tris(dibenzoylmethanate) bis(bathophenanthrolinedisulfonate) complex and ruthenium(II) tris(bathophenanthrolinedisulfonate), or participate in the catalytic oxidation of 2-hexanol by forming water-soluble complexes with palladium .

HY-107864

Erythrosine B free acid Tetraiodofluorescein	Fluorescent Dye	Infection
Erythrosine B free acid is a visibly red dye with colorimetric and fluorescent properties that serves as an important dye for many Gram-positive and -negative bacteria. Erythrosine B free acid can be used for live/dead determination in both colorimetric and fluorescence-based assays for low, medium and high-throughput experimentation .

HY-121694

CENTA	Beta-lactamase	Infection
CENTA is a colorimetric cephalosporin substrate for β-lactamases. Upon hydrolysis by β-lacatamases, CENTA turns from light yellow to chrome yellow, which can be quantified by colorimetric detection at 405 nm as a measure of β-lactamase activity.

HY-D0108

Fluorescein dilaurate	Fluorescent Dye
Fluorescein dilaurate is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-134354A

pNP-ADPr disodium ADP-ribose-pNP disodium	Poly(ADP-ribose) Glycohydrolase (PARG)	Others
pNP-ADPr disodium is a colorimetric substrate that used for the first continuous Poly(ADP-ribose) glycohydrolase (PARG) and ADP-ribosyl hydrolase 3 (ARH3) activity assays. pNP-ADPr disodium can be used for the research of poly(ADP-ribose)polymerase (PARP) enzymes .

HY-120833

Ac-Ile-Glu-Thr-Asp-pNA	Caspase	Others
Ac-Ile-Glu-Thr-Asp-pNA is a substrate for caspase-8. Caspase-8 binds to and cleaves the Ile-Glu-Thr-Asp (IETD) peptide sequence to release p-nitroalinide, which can be quantified by colorimetric detection at 405 nm as a measure of enzyme activity .

HY-W009311

Thiomichler's ketone 4,4'-Bis(dimethylamino)thiobenzophenone	Biochemical Assay Reagents	Others
Thiomichler's ketone (4,4'-Bis (dimethylamino) thiobenzophenone) is a heavy metal complexing agent and a colorimetric/spectrophotometric reagent. Thiomichler's ketone shows selectivity for Hg ²⁺ at pH 3, and exhibits activity towards Pd ²⁺ and Ag ⁺ at pH 3.5. Thiomichler's ketone enables accurate detection of trace Pd ²⁺ by forming an extractable Hg ²⁺ complex via micelle-mediated cloud point extraction, or generating a red coordination complex including Pd (TMK)₄. Thiomichler's ketone is applicable for the determination of trace Pd ²⁺ in antibiotics and catalysts of automobile exhaust purifiers .

HY-B1306R

4-Aminohippuric acid (Standard) p-Aminohippuric acid (Standard)	Reference Standards Biochemical Assay Reagents	Neurological Disease Metabolic Disease
4-Aminohippuric acid (p-Aminohippuric acid) (Standard) is the analytical standard of 4-Aminohippuric acid (HY-B1306). This product is intended for research and analytical applications. 4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

HY-101263

2-Thio-PAF	Biochemical Assay Reagents	Others
2-Thio-PAF, a synthetic analog of PAF, is used in a colorimetric assay for PAF acetylhydrolases .

HY-121549

S-NEPC 4-Nitrophenyl-2S,3S-epoxy-3 phenylpropyl carbonate	Epoxide Hydrolase	Others
S-NEPC (4-Nitrophenyl-2S,3S-epoxy-3 phenylpropyl carbonate) is a colorimetric substrate used to measure epoxide hydrolase activity .

HY-134354

pNP-ADPr ADP-ribose-pNP	Poly(ADP-ribose) Glycohydrolase (PARG)	Others
pNP-ADPr is a colorimetric substrate that used for the first continuous Poly(ADP-ribose) glycohydrolase (PARG) and ADP-ribosyl hydrolase 3 (ARH3) activity assays. pNP-ADPr can be used for the research of poly(ADP-ribose)polymerase (PARP) enzymes .

HY-P10236

Ac-WEHD-pNA	Caspase	Others
Ac-WEHD-pNA is a colorimetric substrate for caspase 1, 4, 5 and 14, which is utilized to measure the caspase activity .

HY-15926S

ONPG-13C 2-Nitrophenyl β-D-galactopyranoside-¹³C	Isotope-Labeled Compounds	Others
ONPG- ¹³C is the ¹³C labeled ONPG. ONPG is a colorimetric and spectrophotometric substrate for detection of β-galactosidase activit .

HY-138653

Lipase Substrate DGGR; 1,2-o-Dilauryl-rac-glycero-3-glutaric acid (6′-methylresorufin) ester	Lipase	Metabolic Disease
Lipase Substrate is a chromogenic substrate of lipase to detect activity . It is used in colorimetric methods to measure lipase activity. It produces a red-purple compound, methylresorufin, upon digestion by the lipase enzyme.

HY-D0374

Reactive Blue 4 sodium	Fluorescent Dye	Others
Reactive Blue 4 sodium is an anthraquinone dye used extensively in the textile industry. Reactive Blue 4 sodium is a single colorimetric chemosensor for sequential determination of multiple analytes with different optical responses in aqueous media .

HY-W151629A

Ferrozine sodium hydrate	Fluorescent Dye	Others
Ferrozine sodium hydrate is a spectrophotometric reagent for iron, can react with divalent Fe to form a stable magenta complex species. The complex has an absorption peak at 562 nm .Ferrozine sodium hydrate-based colorimetric assays can quantify iron in cells

HY-W115718R

Cuprizone (Standard)	Reference Standards Dopamine β-hydroxylase	Neurological Disease
Cuprizone is a copper chelating agent that forms a deep blue copper ketone complex with copper (II). The copper ketone reaction can be used in colorimetric tests for the presence of trace copper. Cuprizone can be used to induce some schizophrenia-like behavior in mice. Cuprizone acts on copper enzymes, including SOD1, cytochrome oxidase, and DβH, thereby causing oxidative stress and increasing DA levels in certain brain regions such as the medial prefrontal cortex (PFC) .

HY-W004617

2,4,6-Tris(4-carboxyphenyl)-1,3,5-triazine 4,4',4''-(1,3,5-Triazine-2,4,6-triyl)tribenzoic acid	MOFs	Others
2,4,6-Tris(4-carboxyphenyl)-1,3,5-triazine (4,4',4''-(1,3,5-Triazine-2,4,6-triyl) tribenzoic acid) is a metal-organic framework. 2,4,6-Tris(4-carboxyphenyl)-1,3,5-triazine is a C₃-symmetric organic ligand with temperature-sensitive ratioluminescent properties. Complexes derived from 2,4,6-Tris(4-carboxyphenyl)-1,3,5-triazine exhibit strong emissivity and can be used for highly sensitive ratiometric fluorescent temperature sensing .

HY-B1306S

4-Aminohippuric acid-d4 p-Aminohippuric acid-d₄	Biochemical Assay Reagents	Neurological Disease Metabolic Disease
4-Aminohippuric acid-d₄ (p-Aminohippuric acid-d₄) is the deuterium labeled 4-Aminohippuric acid (HY-B1306). 4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

HY-W142631

4-(Phenylazo)diphenylamine	Fluorescent Dye	Cancer
4-(Phenylazo)diphenylamine is an excellent colorimetric indicator for the accurate determination of the concentration for a variety of strong bases, Lewis acids, and hydride reducing agents .

Cat. No.	Product Name	Type

HY-15924

Thiazolyl Blue Maximum Cited Publications 182 Publications Verification MTT; Thiazolyl Blue Tetrazolium bromide; Methylthiazolyldiphenyl-tetrazolium bromide	Fluorescent Dye
Thiazolyl Blue (MTT) is a cell-permeable and positively charged tetrazolium dye that is used to detect reductive metabolism in cells. Thiazolyl Blue is taken up by cells through the plasma membrane and then reduced to formazan by intracellular NAD (P) H-oxidoreductases. Thiazolyl Blue is frequently used in colorimetric assays to measure cell proliferation, cytotoxicity, and apoptosis .

HY-137805

Ferrozine 3 Publications Verification	Fluorescent Dye
Ferrozine is a spectrophotometric reagent for iron ions, can react with divalent Fe to form a stable magenta complex species. The complex has an absorption peak at 562 nm . Ferrozine-based colorimetric assays can quantify iron in cells

HY-77962

2-Thiobarbituric acid	Fluorescent Dye
2-Thiobarbituric acid is a commonly used colorimetric reagent for the detection of malondialdehyde (MDA), a marker of lipid peroxidation. 2-Thiobarbituric acid forms a complex with MDA that can be quantified by colorimetric detection at 532 nm as a measure of lipid peroxidation .

HY-D1224

Chlorophenol red-β-D-galactopyranoside

2 Publications Verification

CPRG

Fluorescent Dye

Chlorophenol red-β-D-galactopyranoside (CPRG) is an efficient and sensitive chromogenic substrate for β-galactosidase (HY-P2869), widely used in colorimetric assays. Chlorophenol red-β-D-galactopyranoside itself appears pale yellow. When it is specifically hydrolyzed by β-galactosidase, it releases chlorophenol red. The released chlorophenol red turns purple-red under alkaline or neutral pH conditions. This color change from yellow to red can be quantitatively detected at wavelengths of 540-572 nm using visible spectrophotometry .

HY-15909

BCIP BCIP p-toluidine salt; X-phosphate p-toluidine salt	Fluorescent Dye
BCIP(BCIP p-toluidine salt; X-phosphate p-toluidine salt) is an artificial chromogenic substrate used for the sensitive colorimetric detection of alkaline phosphatase activity .

HY-W013168

4-Nitrophenyl palmitate

4-Nitrophenyl hexadecanoate; p-Nitrophenyl Palmitate; pNpp

Fluorescent Dye

4-Nitrophenyl palmitate (4-Nitrophenyl hexadecanoate) is a chromogenic substrate for lipases and esterases. Upon enzymatic hydrolysis, 4-Nitrophenyl palmitate releases p-nitrophenol, which can be quantified by colorimetric detection at 410 nm as a measure of enzymatic activity. 4-Nitrophenyl palmitate is used to characterize the activity of various bacterial and mammalian enzymes, including those from Burkholderia and porcine pancreatic lipase .

HY-D0221

2,4,6-Tri-2-pyridinyl-1,3,5-triazine NSC 112125; 2,4,6-Tipyidyl-s-tiazie	Fluorescent Dye
2,4,6-Tri-2-pyridinyl-1,3,5-triazine (NSC 112125) is a colorimetric reagent for detecting iron. 2,4,6-Tri-2-pyridinyl-1,3,5-triazine forms a complex with Fe (II) and can be quantified as a measure of iron concentration by colorimetric detection at 594 nm .

HY-125815

Reactive Blue 4 3 Publications Verification	Fluorescent Dye
Reactive Blue 4 is an anthraquinone dye used extensively in the textile industry. Reactive Blue 4 is a single colorimetric chemosensor for sequential determination of multiple analytes with different optical responses in aqueous media .

HY-151644

Fluorescein hydrazide 1 Publications Verification	Fluorescent Dye
Fluorescein hydrazide is a sensitive fluorescent probe for Hg ²⁺ and Co ²⁺ that induces obvious color changes and fluorescence changes. Fluorescein hydrazide can be prepared by the reaction of fluorescein and hydrazine. Fluorescein hydrazide exhibits an excitation wavelength of 508 nM and an emission wavelength of 531 nM [2][3].

HY-131409

D-Val-Leu-Lys-pNA dihydrochloride

D-Val-Leu-Lys-p-itoailide dihydrochloride; D-VLK-pNA dihydrochloride; S 2251 dihydrochloride

Fluorescent Dye

D-Val-Leu-Lys-pNA (D-Val-Leu-Lys-p-nitroanilide) dihydrochloride is a chromogenic peptide substrate that serves as a characteristic substrate for plasmin and plasminogen. D-Val-Leu-Lys-pNA dihydrochloride acts as a sensitive substrate for the DFE27 serine protease derived from Bacillus subtilis DC27. Catalyzed by plasmin, D-Val-Leu-Lys-pNA dihydrochloride binds and hydrolyzes to release p-nitroaniline (pNA), which can be detected colorimetrically at 405 nm as a measure of fibrinolytic activity .

HY-P3236

N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide Ac-IEPD-pNA	Fluorescent Dye
N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide (Ac-IEPD-pNA) is a colorimetric peptide substrate of granzyme B that allows accurate measurement of granzyme B activity .

HY-D0202

Arsenazo III

Fluorescent Dye

Arsenazo III is an azo derivative of chromotropic acid, a metal chrome dye, a chelating agent, and a cation complexing agent. Arsenazo III forms stable 1:1 complexes with Ca ²⁺, Mg ²⁺, Sr ²⁺, Ba ²⁺, K ⁺, and Na ⁺, and its binding affinity for Ca ²⁺ depends on pH, alkali metal cation concentration, and buffer parameters. Arsenazo III serves as a colorimetric indicator for micromolar ionized Ca ²⁺ in cells .

HY-D1599

Rhodamine 6G hydrazide R6GH	Fluorescent Dye
Rhodamine 6G hydrazide (R6GH) is a fluorescent dye. Rhodamine 6G hydrazide can be used in selective colorimetric and fluorescent sensing .

HY-D0943

Nuclear Fast Red Kernechtrot	Fluorescent Dye
Nuclear Fast Red, an anthraquinone dye, is commonly used in conjunction with an excess of aluminum ions as a red nuclear counterstain. Nuclear fast red has been used as a histochemical and colorimetric reagent for calcium . Nuclear fast red as highly sensitive "off/on" fluorescent probe for detecting guanine .

HY-D2329

Fluorescein-PEG4-NHS ester	Fluorescent Dye
Fluorescein-PEG4-NHS ester is a colorimetric probe formed by the reaction of adipic dihydrazide and fluorescein isothiocyanate .

HY-D0813

Zincon sodium	Fluorescent Dye
Zincon sodium is an excellent colorimetric reagent for the detection of zinc and copper ions in aqueous solution. Zincon sodium can be used for the determination of zinc, copper, and cobalt ions in metalloproteins .

HY-107864

Erythrosine B free acid Tetraiodofluorescein	Fluorescent Dye
Erythrosine B free acid is a visibly red dye with colorimetric and fluorescent properties that serves as an important dye for many Gram-positive and -negative bacteria. Erythrosine B free acid can be used for live/dead determination in both colorimetric and fluorescence-based assays for low, medium and high-throughput experimentation .

HY-121694

CENTA	Fluorescent Dye
CENTA is a colorimetric cephalosporin substrate for β-lactamases. Upon hydrolysis by β-lacatamases, CENTA turns from light yellow to chrome yellow, which can be quantified by colorimetric detection at 405 nm as a measure of β-lactamase activity.

HY-D0108

Fluorescein dilaurate	Fluorescent Dye
Fluorescein dilaurate is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-D0374

Reactive Blue 4 sodium	Fluorescent Dye
Reactive Blue 4 sodium is an anthraquinone dye used extensively in the textile industry. Reactive Blue 4 sodium is a single colorimetric chemosensor for sequential determination of multiple analytes with different optical responses in aqueous media .

HY-W142631

4-(Phenylazo)diphenylamine	Fluorescent Dye
4-(Phenylazo)diphenylamine is an excellent colorimetric indicator for the accurate determination of the concentration for a variety of strong bases, Lewis acids, and hydride reducing agents .

HY-137858

H-Gly-Arg-pNA hydrochloride Gly-Arg-4-NA hydrochloride; GR-pNA hydrochloride; GR p-itoailide hydrochloride	Fluorescent Dye
H-Gly-Arg-pNA hydrochloride (GR-pNA hydrochloride) is a colorimetric substrate for thrombin. H-Gly-Arg-pNA is preferentially bound by thrombin and cleaves the Gly-Arg (GR) peptide sequence, releasing p-nitroaniline (pNA) that can be detected colorimetrically at 405 nm. H-Gly-Arg-pNA hydrochloride is used as a fluorescent dye to measure thrombin activity .

HY-D0107

Fluorescein dicaproate	Fluorescent Dye
Fluorescein dicaproate is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-D0101

Fluorescein-diphosphat diammonium	Fluorescent Dye
Fluorescein-diphosphat (diammonium) is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-D0105

Fluorescein diacetate 6-isothiocyanate	Fluorescent Dye
Fluorescein diacetate 6-isothiocyanate is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-D0103

Fluorescein diacetate 5-maleimide	Fluorescent Dye
Fluorescein diacetate 5-maleimide is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-D0100

Fluorescein-diacetate-5-isothiocyanat	Fluorescent Dye
Fluorescein-diacetate-5-isothiocyanat is a colorimetric probe formed by the reaction of adipic acid dihydrazide and fluorescein isothiocyanate.

HY-W011422

2,6-Dibromo-4-(chloroimino)cyclohexa-2,5-dienone

NSC 528

Fluorescent Dye

2,6-Dibromo-4-(chloroimino)cyclohexa-2,5-dienone (NSC 528) is a colorimetric dye used for the detection of phenolic compounds. 2,6-Dibromo-4-(chloroimino)cyclohexa-2,5-dienone reacts with phenolic compounds at a pH of about 9.4 to produce an indigo dye. 2,6-Dibromo-4-(chloroimino)cyclohexa-2,5-dienone has been used as a Gibbs reagent for the colorimetric detection of phenolic compounds. 2,6-Dibromo-4-(chloroimino)cyclohexa-2,5-dienone has also been used in a colorimetric reaction for the quantitative colorimetric detection of aflatoxins, turning the colorless aflatoxins green with an absorption band at 673 nm.

HY-W009458

3-Indoxyl phosphate sodium

3-IP sodium

Fluorescent Dye

3-Indoxyl phosphate (3-IP) is a chromogenic and electrochemical substrate for alkaline phosphatase. Upon enzymatic cleavage by alkaline phosphatase, 3-indoxyl is released and subsequently oxidized to produce water-insoluble indigo, which can be quantified by colorimetric detection at 660 nm as a measure of alkaline phosphatase activity. 3-Indoxyl phosphate can also be converted to water-soluble leucoindigo by reduction of indigo in alkaline solution by sodium dithionite, which can be quantified by colorimetric detection at 415 nm or voltametric detection as a measure of alkaline phosphatase activity.2 3-Indoxyl phosphate has been used in ELISAs.

HY-145499

XTT sodium hydrate	Fluorescent Dye
XTT is a cell-impermeable, negatively charged tetrazolium dye that produces a water-soluble formazan when reduced at the cell surface by cellular-derived NADH and an electron mediator. It is frequently used in colorimetric assays to measure cell proliferation, cytotoxicity, and apoptosis.

HY-120971

N-Decanoyl p-Nitroaniline

DepNA

Fluorescent Dye

N-Decanoyl p-nitroaniline (DepNA) is one of several nitroaniline fatty acid amides which can be used to measure fatty acid amide hydrolase (FAAH) activity.1 FAAH is a relatively unselective enzyme in that it accepts a variety of amide head groups other than the ethanolamine of its endogenous substrate anandamide (AEA). It also will hydrolyze fatty acid amides with fewer carbons and fewer double bonds than arachidonate. Exposure of DepNA to FAAH activity results in the release of the yellow colorimetric dye p-nitroaniline (ε=13,500 at 410 nm). This allows the fast and convenient measurement of FAAH activity using a 96 well plate spectrophotometer.

HY-107864R

Erythrosine B free acid (Standard)

Tetraiodofluorescein (Standard)

Fluorescent Dye

Erythrosine B free acid (Standard) is the analytical standard of Erythrosine B (free acid) (HY-107864). This product is intended for research and analytical applications. Erythrosine B free acid is a visibly red dye with colorimetric and fluorescent properties that serves as an important dye for many Gram-positive and -negative bacteria. Erythrosine B free acid can be used for live/dead determination in both colorimetric and fluorescence-based assays for low, medium and high-throughput experimentation .

HY-D2969

CYDA	Fluorescent Dye
CYDA is a colorimetric probe based on cyanine dyes, which enables highly sensitive and selective detection of Cu²⁺. CYDA can be used for urine copper detection in Wilson's disease .

HY-DY1106

Ferrozine (solution)	Fluorescent Dye
Ferrozine (solution) is a spectrophotometric reagent for iron ions, can react with divalent Fe to form a stable magenta complex species. The complex has an absorption peak at 562 nm . Ferrozine-based colorimetric assays can quantify iron in cells Solvent and concentration: ddH2O: 10 mM

HY-DY1086

Thiazolyl Blue (solution)

MTT (solution); Thiazolyl Blue Tetrazolium bromide (solution); Methylthiazolyldiphenyl-tetrazolium bromide (solution)

Fluorescent Dye

Thiazolyl Blue (solution) (MTT (solution)) is a cell-permeable and positively charged tetrazolium dye that is used to detect reductive metabolism in cells. Thiazolyl Blue is taken up by cells through the plasma membrane and then reduced to formazan by intracellular NAD (P) H-oxidoreductases. Thiazolyl Blue is frequently used in colorimetric assays to measure cell proliferation, cytotoxicity, and apoptosis .
Solvent and concentration: PBS: 5 mg/mL

HY-D3244

RDDB

Fluorescent Dye

RDDB is a rhodamine-based turn-on fluorescent and colorimetric chemosensor selective for Mn ²⁺, with a limit of detection of 5×10 ^-8 M (excitation wavelength: 480-550 nm; fluorescence signal collection range: >590 nm). In the presence of Mn ²⁺, RDDB undergoes a spirolactam ring-opening reaction of its rhodamine hydrazide moiety, resulting in turn-on fluorescence and a color change. RDDB can be used for intracellular Mn ²⁺ imaging .

HY-D3152

NRh-Cu

Fluorescent Dye

NRh-Cu is a highly sensitive near-infrared fluorescence turn-on indicator and Cu ²⁺-selective probe (λ_ex=680 nm, λ_em=740 nm). When NRh-Cu interacts with Cu ²⁺, it undergoes a structural transition from a non-fluorescent spirocyclic state to a fluorescent ring-opened state, which drives the enhancement of fluorescence emission. NRh-Cu can be used for Cu ²⁺ imaging in live cells and in vivo .

Cat. No.	Product Name	Type

HY-W034953

Bathocuproine disulfonate disodium

2 Publications Verification

Biochemical Assay Reagents

Bathocuproine disulfonate disodium (BCS) is an organic compound used as a highly sensitive colorimetric reagent for copper ions in biochemical and analytical applications. It has a bright yellow color and absorbs light at specific wavelengths, so it can be used to detect and quantify trace copper. In biochemical applications, BCS is commonly used to study the role of copper ions in various biological processes. Copper is an essential nutrient for many organisms, but it can also be toxic in high concentrations, so accurate measurement of copper levels is important to understand its impact on living systems. In terms of analysis, BCS is often used in environmental monitoring and water quality testing to detect copper pollution. It can detect copper even at very low concentrations, making it an invaluable tool for identifying potential sources of pollution and assessing the impact of industrial activities on aquatic ecosystems.

HY-W009694

3,5-Dinitrosalicylic acid	Biochemical Assay Reagents
3,5-Dinitrosalicylic acid the derivative of salicylic acid. 3,5-Dinitrosalicylic acid is used in the α-amylase assay, carbohydrase assay, and for the colorimetric determination of reducing substances .

HY-15926

ONPG Maximum Cited Publications 6 Publications Verification 2-Nitrophenyl β-D-galactopyranoside	Biochemical Assay Reagents
ONPG is a colorimetric and spectrophotometric substrate for detection of β-galactosidase activity.

HY-15920

INT 3 Publications Verification Iodonitrotetrazolium chloride; p-Iodonitrotetrazolium Violet	Biochemical Assay Reagents
INT (Iodonitrotetrazolium chloride) is a biochemical reagent mainly used in the iodonitrotetrazolium chloride (INT) colorimetric method to assess the metabolic activity of cells and the activity of enzymes .

HY-W129633

2,6-Dichlorophenolindophenol sodium hydrate

1 Publications Verification

DCIP sodium hydrate; DPIP sodium hydrate

Biochemical Assay Reagents

2,6-Dichlorophenolindophenol (DCIP; DPIP) sodium hydrate is a redox chromogenic indicator with a redox potential of +217 mV relative to SHE, and it acts as a substrate for reduction reactions. During the metabolic process of nutrient consumption by Saccharomyces cerevisiae, 2,6-Dichlorophenolindophenol sodium hydrate is reduced from dark blue to colorless, resulting in a decrease in absorbance. 2,6-Dichlorophenolindophenol sodium hydrate is widely used in spectrophotometric biochemical oxygen demand determination and preclinical colorimetric toxicity analysis for heavy metal ion detection based on Saccharomyces cerevisiae .

HY-Y0699

Methyl red	Biochemical Assay Reagents
Methyl red is a pH-sensitive acid-base indicator and colorimetric reagent with a pKa of 5.1. Methyl red achieves visual judgment of the titration endpoint through reversible structural changes of protonation (red, pH <4.4) and deprotonation (yellow, pH >6.2). Methyl red is widely used in acid-base titration in chemical analysis and buffer pH monitoring in biochemistry .

HY-W011654

4-Aminophenyl-β-D-galactopyranoside, 98%

4-Aminophenyl-beta-D-galactopyranoside, 98%

Biochemical Assay Reagents

4-Aminophenyl-β-D-galactopyranoside, 98% is a highly efficient substrate for β-galactosidase. It is specifically hydrolyzed by this enzyme to release galactose and electroactive p-aminophenol. 4-Aminophenyl-β-D-galactopyranoside, 98% is widely used in colorimetric and electrochemical assays for detecting β-galactosidase activity and determining enzyme kinetics, such as in biosensing fields including cellular senescence, pathogen and contaminant detection. In addition, since β-galactosidase is often overexpressed in primary ovarian cancer, 4-Aminophenyl-β-D-galactopyranoside, 98% can also be applied to related research on primary ovarian cancer .

HY-15929

TBHBA

1 Publications Verification

2,4,6-Tribromo-3-hydroxybenzoic acid

Biochemical Assay Reagents

TBHBA (2,4,6-Tribromo-3-hydroxybenzoic acid) is a chemical colorimetric agent and nanomaterial surface modifier. TBHBA can react with some oxidants (such as H₂O₂) to generate high-absorbance quinoneimine dyes, which enhance the sensitivity of HDL cholesterol enzymatic determination. TBHBA can be used as a bromine-containing coupling agent to modify the surface of silica nanoparticles through esterification reaction. Thereby, organic flame retardant groups are introduced to improve the thermal stability and flame retardant properties of nanocomposites. TBHBA can be used in clinical biochemical testing (such as serum lipoprotein analysis) and the preparation of flame-retardant polymer nanocomposites .

HY-W110793

Dithizone

Diphenylthiocarbazone

Biochemical Assay Reagents

Dithizone can be toxic to pancreatic islet cells and cause experimental diabetes. Dithizone can be used for in vitro in vivo staining of transplanted islets and cytoplasmic granules of bone marrow cells. Dithizone can be used as a chelating agent and colorimetric indicator for the detection and extraction of various heavy metals, including lead and mercury, in analytical and biochemical applications. Dithizone forms stable colored complexes with metal ions and can be quantitatively analyzed by methods such as spectrophotometry .

HY-W127790

Bathophenanthrolinedisulfonic acid disodium

Biochemical Assay Reagents

Bathophenanthrolinedisulfonic acid disodium salt (BPS) is a colorimetric reagent for iron detection, with a wavelength of 535 nm for iron complex. It can be used for iron determination in aqueous solution systems without the need for extraction solvents. BPS can serve as a precursor to prepare Europium(III) tris(dibenzoylmethanate) bis(bathophenanthrolinedisulfonate) complex and ruthenium(II) tris(bathophenanthrolinedisulfonate), or participate in the catalytic oxidation of 2-hexanol by forming water-soluble complexes with palladium .

HY-W009311

Thiomichler's ketone

4,4'-Bis(dimethylamino)thiobenzophenone

Biochemical Assay Reagents

Thiomichler's ketone (4,4'-Bis (dimethylamino) thiobenzophenone) is a heavy metal complexing agent and a colorimetric/spectrophotometric reagent. Thiomichler's ketone shows selectivity for Hg ²⁺ at pH 3, and exhibits activity towards Pd ²⁺ and Ag ⁺ at pH 3.5. Thiomichler's ketone enables accurate detection of trace Pd ²⁺ by forming an extractable Hg ²⁺ complex via micelle-mediated cloud point extraction, or generating a red coordination complex including Pd (TMK)₄. Thiomichler's ketone is applicable for the determination of trace Pd ²⁺ in antibiotics and catalysts of automobile exhaust purifiers .

HY-D1224A

Chlorophenol red β-D-galactopyranoside sodium

CPRG sodium

Biochemical Assay Reagents

Chlorophenol red-β-D-galactopyranoside (CPRG) sodium is an efficient and sensitive chromogenic substrate for β-galactosidase (HY-P2869), widely used in colorimetric assays. Chlorophenol red-β-D-galactopyranoside sodium itself appears pale yellow. When it is specifically hydrolyzed by β-galactosidase, it releases chlorophenol red. The released chlorophenol red turns purple-red under alkaline or neutral pH conditions. This color change from yellow to red can be quantitatively detected at wavelengths of 540-572 nm using visible spectrophotometry .

HY-165025

2-thioacetyl MAGE	Biochemical Assay Reagents
2-thioacetyl MAGE is a colorimetric substrate of a serine hydrolase enzyme KIAA1363 .

HY-W129500

N-[[Bis[4-(dimethylamino)phenyl]amino]carbonyl]glycine sodium	Biochemical Assay Reagents
N-[[Bis[4-(dimethylamino)phenyl]amino]carbonyl]glycine sodium can be used as a biomonitoring reagent to measure redox activity through a colorimetric reaction.

HY-157926

Nitroso-PSAP	Biochemical Assay Reagents
Nitroso-PSAP is a sensitive and specific chromogenic reagent for iron (Fe ²⁺), which is used for the colorimetric determination of iron in blood after mineralization with periodic acid. TNitroso-PSAP chelates with iron (Fe ²⁺) to produce a green complex (λmax=756 nm, Epsilon = 4.5 x 10 < sup > 4 < / sup > dm < sup > 3 < / sup > mol < sup > 1 < / sup > cm < sup > 1 < / sup >) .

HY-171819

O157 Medium powder	Biochemical Assay Reagents
O157 Medium powder can be used to prepare a colorimetric medium for the separation and differentiation of Escherichia coli O157.

Cat. No.	Product Name	Target	Research Area

HY-131409

D-Val-Leu-Lys-pNA dihydrochloride D-Val-Leu-Lys-p-itoailide dihydrochloride; D-VLK-pNA dihydrochloride; S 2251 dihydrochloride	Fluorescent Dye	Others
D-Val-Leu-Lys-pNA (D-Val-Leu-Lys-p-nitroanilide) dihydrochloride is a chromogenic peptide substrate that serves as a characteristic substrate for plasmin and plasminogen. D-Val-Leu-Lys-pNA dihydrochloride acts as a sensitive substrate for the DFE27 serine protease derived from Bacillus subtilis DC27. Catalyzed by plasmin, D-Val-Leu-Lys-pNA dihydrochloride binds and hydrolyzes to release p-nitroaniline (pNA), which can be detected colorimetrically at 405 nm as a measure of fibrinolytic activity .

HY-P3236

N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide Ac-IEPD-pNA	Ser/Thr Protease	Cancer
N-Acetyl-Ile-Glu-Pro-Asp-p-nitroanilide (Ac-IEPD-pNA) is a colorimetric peptide substrate of granzyme B that allows accurate measurement of granzyme B activity .

HY-P5348

Ac-LEHD-pNA	Peptides	Others
Ac-LEHD-pNA is a biological active peptide. (Caspase-9 substrate; pNA (4-nitroaniline)-derived caspase substrates are widely used for the colorimetric detection of various caspase activities. Cleavage of pNA peptides by caspases generates pNA that is monitored colorimetrically at ~405 nm. pNA has maximum absorption around 408 nm.)

HY-120833

Ac-Ile-Glu-Thr-Asp-pNA	Caspase	Others
Ac-Ile-Glu-Thr-Asp-pNA is a substrate for caspase-8. Caspase-8 binds to and cleaves the Ile-Glu-Thr-Asp (IETD) peptide sequence to release p-nitroalinide, which can be quantified by colorimetric detection at 405 nm as a measure of enzyme activity .

HY-P10236

Ac-WEHD-pNA	Caspase	Others
Ac-WEHD-pNA is a colorimetric substrate for caspase 1, 4, 5 and 14, which is utilized to measure the caspase activity .

HY-126785

Suc-AAP-Abu-pNA Colorimetric Elastase Substrate	Elastase	Others
Suc-AAP-Abu-pNA (Colorimetric Elastase Substrate) is a specific substrate for pancreatic elastase (K_m = 100 μM; K_cat/K_m = 35,300 s ^-1 M ^-1 for rat pancreatic elastase; K_m = 30 μM; K_cat/K_m = 351,000 s ^-1 M ^-1 for porcine pancreatic elastase). Suc-AAP-Abu-pNA also promotes OPC migration .

HY-P5992

Factor VIIa substrate	Peptides	Others
Factor VIIa substrate is a colorimetric substrate for Factor VIIa, that can be measured by absorbance at 405 nm .

HY-P4335

Bz-RGFFP-4MβNA	Ser/Thr Protease	Others
Bz-RGFFP-4MβNA, a substrate for Cathepsin D, is suitable for either colorimetric or fluorometric assay .

HY-P10001

Z-IETD-pNA Z-Ile-Glu-Thr-Asp-pNA	Caspase	Cancer
Z-IETD-pNA (Z-Ile-Glu-Thr-Asp-pNA) is a colorimetric caspase-8 and granzyme B substrate. Z-IETD-pNA is hydrlyzed by caspase 8 to generate pNA .

HY-P10059

Boc-Val-Gly-Arg-βNA	Peptides	Others
Boc-Val-Gly-Arg-βNA is a colorimetric substrate for plasminogen activator .

HY-168378A

D-Val-Leu-Lys-pNA acetate S-2251 acetate	Fluorescent Dye	Others
D-Val-Leu-Lys-pNA acetate (S-2251 acetate) is a chromogenic peptide substrate that serves as a characteristic substrate for plasmin and plasminogen. D-Val-Leu-Lys-pNA acetate acts as a sensitive substrate for the DFE27 serine protease derived from Bacillus subtilis DC27. Catalyzed by plasmin, D-Val-Leu-Lys-pNA acetate binds and hydrolyzes to release p-nitroaniline (pNA), which can be detected colorimetrically at 405 nm as a measure of fibrinolytic activity .

Cat. No.	Product Name

HY-K0325

*Total Superoxide Dismutase (SOD) Activity Colorimetric* Assay Kit (WST-8 Method)**
MCE Total Superoxide Dismutase (SOD) Activity Colorimetric Assay Kit (WST-8 Method) employs a water-soluble tetrazolium salt (WST-8)–based colorimetric system and quantifies total SOD activity in various biological samples by measuring the inhibition of WST-8 reduction to water-soluble formazan in the xanthine/xanthine oxidase system at 450 nm.

HY-K2002

BCA Protein Assay Kit 1 Publications Verification
MCE BCA Protein Assay Kit is a colorimetric assay based on the bicinchoninic acid (BCA) reaction principle for quantitative protein determination.

HY-K1501

NADP⁺/NADPH Assay Kit (WST-8) 2 Publications Verification
MCE NADP⁺/NADPH Assay Kit (WST-8) is a colorimetric assay that conveniently detects the oxidized (NADP⁺) and reduced (NADPH) forms of coenzyme II within cells, tissues, and other samples.

HY-K0313

NAD⁺/NADH Assay Kit (WST-8) 2 Publications Verification
MCE NAD⁺/NADH Assay Kit (WST-8) is a colorimetric assay that conveniently detects the oxidized (NAD⁺) and reduced (NADH) forms of coenzyme Ⅰ within cells, tissues, and other samples.

HY-K0301

Cell Counting Kit-8 Maximum Cited Publications 3907 Publications Verification
Cell Counting Kit-8 (CCK-8) allows sensitive colorimetric assays for the determination of cell viability in cell proliferation and cytotoxicity assays.The 5 mL volume is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

HY-K0324

Total Superoxide Dismutase (SOD) Activity Colorimetric Assay Kit (Xanthine Oxidase-NBT Method)

MCE MCE Total Superoxide Dismutase (SOD) Activity Colorimetric Assay Kit (Xanthine Oxidase-NBT Method) is based on the xanthine oxidase–NBT chromogenic system and quantitatively determines total SOD activity in various biological samples by measuring the inhibition of NBT reduction to formazan in the xanthine/xanthine oxidase–generated superoxide system at 560 nm. It is suitable for the determination of SOD activity in cell or tissue homogenate supernatants, whole blood, erythrocyte extracts, serum, and other biological samples.

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-B1306

4-Aminohippuric acid 4 Publications Verification p-Aminohippuric acid	Classification of Application Fields Ketones, Aldehydes, Acids Other Diseases Endogenous metabolite Disease Research Fields Source Classification	Others
4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

HY-B1306R

4-Aminohippuric acid (Standard) p-Aminohippuric acid (Standard)	Structural Classification Ketones, Aldehydes, Acids Endogenous metabolite Source Classification	Reference Standards Biochemical Assay Reagents
4-Aminohippuric acid (p-Aminohippuric acid) (Standard) is the analytical standard of 4-Aminohippuric acid (HY-B1306). This product is intended for research and analytical applications. 4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

Cat. No.	Product Name	Chemical Structure

HY-15926S

ONPG-13C
ONPG- ¹³C is the ¹³C labeled ONPG. ONPG is a colorimetric and spectrophotometric substrate for detection of β-galactosidase activit .

HY-B1306S

4-Aminohippuric acid-d4

4-Aminohippuric acid-d₄ (p-Aminohippuric acid-d₄) is the deuterium labeled 4-Aminohippuric acid (HY-B1306). 4-Aminohippuric acid (p-Aminohippuric acid) is a coordination ligand for metal ions (such as Cu ²⁺, Fe ³⁺, Hg ²⁺) and a functionalization reagent for nanomaterials. 4-Aminohippuric acid can coordinate with metal ions or modify the surface of materials such as carbon nanotubes and gold nanoparticles through amino and carboxyl groups. 4-Aminohippuric acid can form stable complexes with metal ions or participate in the synthesis of nanomaterials as a reducing agent/stabilizer, enriching metal ions or giving nanoparticles peroxidase-mimicking activity. 4-Aminohippuric acid can be used to construct highly sensitive electrochemical sensors or colorimetric sensors to detect and quantitatively analyze heavy metal ions such as copper, iron, and mercury in environmental water samples and biological samples. 4-Aminohippuric acid may also be a biomarker for attention-deficit/hyperactivity disorder (ADHD) .

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