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spectrophotometry

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By Targets:	Biochemical Assay Reagents (8) Fluorescent Dye (1)
By Research Areas:	Metabolic Disease (1)

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

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-137006

MTT Formazan	Fluorescent Dye	Others
MTT Formazan is a purple water-insoluble product formed by the reduction of yellow soluble MTT by succinate dehydrogenase in the mitochondria of viable cells. The amount of MTT Formazan produced is proportional to cellular metabolic activity, and it can serve as an indicator for evaluating cell viability and proliferation. MTT Formazan exhibits solvent-dependent solubility properties, and its absorbance value can be measured by spectrophotometry to reflect cellular status. MTT Formazan also supports the assessment of cell viability in bacterial MTT assays. MTT Formazan can be used in photoacoustic microscopy to enhance the imaging effect of viable cells, especially in applications in the fields of three-dimensional cell culture and tissue engineering .

HY-W074541

Girard’s reagent T Trimethylacetohydrazideammonium chloride	Biochemical Assay Reagents	Others
Girard's reagent T is often used in analytical chemistry as a derivatizing agent for carbonyl compounds. Girard's reagent T reacts with ketones and aldehydes to form stable hydrazones that can be readily analyzed by various techniques including chromatography and spectrophotometry. In addition, Girard's Reagent T has been used in the synthesis of a variety of organic compounds, including pharmaceuticals and agrochemicals.

HY-137878

2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid PNP-α-NeuNAc	Biochemical Assay Reagents	Others
2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) is a classic chromogenic substrate for neuraminidase. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid releases p-nitrophenol upon enzymatic hydrolysis, allowing quantification of enzyme activity and inhibitory effects via spectrophotometry. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) acts as a sialyl donor in the process of enzyme-catalyzed trans-sialylation .

HY-D1895A

3,5-DiBr-PAESA sodium	Biochemical Assay Reagents	Others
3,5-DiBr-PAESA sodium is a water-soluble pyridylazo-based highly sensitive chromogenic reagent. With the assistance of EDTA for masking copper and bromide ions for dissociating silver chelates, 3,5-DiBr-PAESA sodium enables accurate determination of sub-milligram level silver ions in strongly acidic high-copper systems via flow injection spectrophotometry .

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-D1895

3,5-DiBr-PAESA	Biochemical Assay Reagents	Others
3,5-DiBr-PAESA is a water-soluble pyridylazo-based highly sensitive chromogenic reagent. With the assistance of EDTA for masking copper and bromide ions for dissociating silver chelates, 3,5-DiBr-PAESA enables accurate determination of sub-milligram level silver ions in strongly acidic high-copper systems via flow injection spectrophotometry .

HY-W009022

Diantipyrylmethane	Biochemical Assay Reagents	Others
Diantipyrylmethane is a chromogenic reagent commonly used for the determination of the contents of metals such as Au (III), Ti (IV), Ir, Fe (III), molybdenum, neodymium, U (IV), iridium, platinum and rhenium via spectrophotometry and extraction photometry. Diantipyrylmethane can also form a fluorescent complex with Er (III) ions, which is applied to the determination of erbium .

HY-D1224A

Chlorophenol red β-D-galactopyranoside sodium CPRG sodium	Biochemical Assay Reagents	Others
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 .

Cat. No.	Product Name	Type

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 .

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-D1895A

3,5-DiBr-PAESA sodium	Fluorescent Dye
3,5-DiBr-PAESA sodium is a water-soluble pyridylazo-based highly sensitive chromogenic reagent. With the assistance of EDTA for masking copper and bromide ions for dissociating silver chelates, 3,5-DiBr-PAESA sodium enables accurate determination of sub-milligram level silver ions in strongly acidic high-copper systems via flow injection spectrophotometry .

HY-D1895

3,5-DiBr-PAESA	Fluorescent Dye
3,5-DiBr-PAESA is a water-soluble pyridylazo-based highly sensitive chromogenic reagent. With the assistance of EDTA for masking copper and bromide ions for dissociating silver chelates, 3,5-DiBr-PAESA enables accurate determination of sub-milligram level silver ions in strongly acidic high-copper systems via flow injection spectrophotometry .

Cat. No.	Product Name	Type

HY-W074541

Girard’s reagent T Trimethylacetohydrazideammonium chloride	Biochemical Assay Reagents
Girard's reagent T is often used in analytical chemistry as a derivatizing agent for carbonyl compounds. Girard's reagent T reacts with ketones and aldehydes to form stable hydrazones that can be readily analyzed by various techniques including chromatography and spectrophotometry. In addition, Girard's Reagent T has been used in the synthesis of a variety of organic compounds, including pharmaceuticals and agrochemicals.

Girard’s reagent T

Trimethylacetohydrazideammonium chloride

Biochemical Assay Reagents

Girard's reagent T is often used in analytical chemistry as a derivatizing agent for carbonyl compounds. Girard's reagent T reacts with ketones and aldehydes to form stable hydrazones that can be readily analyzed by various techniques including chromatography and spectrophotometry. In addition, Girard's Reagent T has been used in the synthesis of a variety of organic compounds, including pharmaceuticals and agrochemicals.

HY-137878

2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid PNP-α-NeuNAc	Biochemical Assay Reagents
2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) is a classic chromogenic substrate for neuraminidase. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid releases p-nitrophenol upon enzymatic hydrolysis, allowing quantification of enzyme activity and inhibitory effects via spectrophotometry. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) acts as a sialyl donor in the process of enzyme-catalyzed trans-sialylation .

2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid

PNP-α-NeuNAc

Biochemical Assay Reagents

2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) is a classic chromogenic substrate for neuraminidase. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid releases p-nitrophenol upon enzymatic hydrolysis, allowing quantification of enzyme activity and inhibitory effects via spectrophotometry. 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic acid (PNP-α-NeuNAc) acts as a sialyl donor in the process of enzyme-catalyzed trans-sialylation .

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 .

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-W009022

Diantipyrylmethane	Biochemical Assay Reagents
Diantipyrylmethane is a chromogenic reagent commonly used for the determination of the contents of metals such as Au (III), Ti (IV), Ir, Fe (III), molybdenum, neodymium, U (IV), iridium, platinum and rhenium via spectrophotometry and extraction photometry. Diantipyrylmethane can also form a fluorescent complex with Er (III) ions, which is applied to the determination of erbium .

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 .

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 .

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BODIPY 493/503 purchased from MedChemExpress. Usage Cited in: Nat Commun. 2025 Feb 1;16(1):1241. [Abstract]

MedchemExpress Validation 01

Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature. Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature. Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST for 2 hour at room temperature. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80438, 1/10000) was used in 5% non-fat milk in TBST at 4°C overnight. Goat Anti-Mouse/Rabbit IgG-HRP Secondary Antibody (1/10000) was used for 1 hour at room temperature.

BODIPY 493/503 purchased from MedChemExpress. Usage Cited in: Nat Commun. 2025 Feb 1;16(1):1241. [Abstract]

MedchemExpress Validation 01

MedchemExpress Validation 03

Western blot analysis of extracts from THP-1(lane 2(20μg), Jurkat (lane 3(20μg) and NIH3T3(lane 4(20μg) using FOXO1A (HY-P80132) Rabbit mAb. Proteins were transferred

MedchemExpress Validation 04

MedchemExpress Validation

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