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Results for "

pH+indicator

" in MedChemExpress (MCE) Product Catalog:

By Targets:	Biochemical Assay Reagents (16) Cytochrome P450 (1) Environmental Pollutants (6) Fluorescent Dye (26) Glutathione Peroxidase (1) Isotope-Labeled Compounds (1) Reference Standards (2)
By Research Areas:	Cancer (2) Metabolic Disease (1) Neurological Disease (1)

Inhibitors & Agonists

Fluorescent Dye

Biochemical Assay Reagents

Isotope-Labeled Compounds

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-D0169

Phenol Red 1 Publications Verification Phenolsulfonephthalein	Environmental Pollutants Fluorescent Dye	Others
Phenol red (Phenolsulfonephthalein) is a pH indicator dye, relying on a distinct color change from pink to yellow in case of a positive reaction .

HY-D0166

Neutral Red	Fluorescent Dye	Others
Neutral Red, a nitrogenous pH-indicator with a pK_i of 6.8, is an indicator for the internal acidification of thylakoids. Neutral Red stains lysosomes red .

HY-133527

OG 488, SE Oregon green 488 succinimidyl ester	Fluorescent Dye	Neurological Disease
OG 488, SE (Oregon green 488 succinimidyl ester), a fluorescent pH indicator, has many applications in biochemistry and neurosciences .

HY-B1571

Bromophenol blue	Environmental Pollutants Fluorescent Dye	Others
Bromophenol blue is an acid phthalein dye, and it is used as a tracking dye for electrophoresis. Bromophenol blue is also used as a pH indicator, with a transition range of pH 3 to 4.6. Bromophenol blue is used as a sensor for the determination of several compounds including ammonia, drugs, proteins and amino acids. The binding of Bromophenol blue to proteins is accompanied by the appearance of a strong absorbance at 610 nm .

HY-D0012

Bromothymol Blue	Environmental Pollutants Fluorescent Dye	Others
Bromothymol Blue is a pH indicator.

HY-D0023

Pyranine 2 Publications Verification HPTS; Solvent Green 7	Environmental Pollutants Fluorescent Dye	Others
Pyranine (HPTS; Solvent Green 7) is a cell-impermeant pH-sensitive fluorescent indicator. Pyranine acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-W040144

Bromocresol green	Fluorescent Dye	Others
Bromocresol green is a pH-sensitive triphenylmethane dye commonly used for the determination of protein and albumin in serum. Bromocresol green is a bio-based dye with a yellow-green to blue-green color. Bromocresol green turns yellow (λmax=435 nm, protonated form) when placed in acidic solution (e.g. pH=4.15), and turns blue in basic solution (λmax=615 nm, deprotonated form). Bromocresol green is widely used as a pH indicator in the field of biochemical analysis. In addition, Bromocresol green is also used to detect the concentration of molecules such as creatinine, and to judge the viability of cells .

HY-D0169A

Phenol Red sodium salt 1 Publications Verification Phenolsulfonephthalein sodium salt	Fluorescent Dye Glutathione Peroxidase	Others
Phenol red (Phenolsulfonephthalein) sodium salt is a pH indicator dye. Phenol Red sodium salt is also an antagonist of rat P2X1R. Phenol Red sodium salt enhances the halogenating activity of myeloperoxidase. Phenol Red sodium salt shows a distinct color change from pink to yellow in a positive pH reaction .

HY-D1445

LysoSensor PDMPO 1 Publications Verification	Fluorescent Dye	Metabolic Disease
PDMPO, a lysosome pH indicator, is an excellent fluorescent acidotropic reagent for fluorescence imaging. PDMPO is a potent tool with which to study acidic organelles of live cells. PDMPO exhibits pH-dependent dual-excitation and dual-emission spectral peaks. PDMPO produces a blue fluorescence in weakly acidic organelles and shifts to yellow in more acidic lysosomes. (Abs=329 nm; Em=440/540 nm) .

HY-D0219

Thymol blue Thymolsulphonephthalein	Fluorescent Dye	Others
Thymol blue is a reversible pH indicator that responds to the pH of the solution through structural changes of protonation and deprotonation. Thymol blue is red (HI ^- form) under acidic conditions and blue (I ^2- form) under alkaline conditions. Quantitative detection is achieved through the absorption peak shift (435 nm/596 nm) of the UV-visible spectrum. Thymol blue selectively responds to pH changes, changing from red to yellow at pH 1.2-2.8 and from yellow to blue at pH 8.0-9.6. Thymol blue can be fixed in a silica gel matrix through sol-gel technology to form a solid-state sensor for in-situ pH measurement in the marine environment and acid-base monitoring in the biomedical field[1][2].

HY-125457

α-Naphtholbenzein p-Naphtolbenzein	Biochemical Assay Reagents	Others
α-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein is commonly used in experiments such as acid-base neutralization reactions, titration, and pH measurement .

HY-W087928

Bromocresol purple	Biochemical Assay Reagents	Others
Bromocresol purple is a pH indicator, whose color changes from yellow to purple when the pH increases from 5.2 to 6.8. Bromocresol purple can be used for detecting yeast cells with plasma membrane damage and measuring serum albumin concentrations .

HY-D0142

Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium	Environmental Pollutants Fluorescent Dye	Others
Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium is a fluorescent dye and pH indicator, also as a ligand of multifunctional metal-organic framework. Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium has been used to detect CO₂ release .

HY-128369

Acid Yellow 36 Metanil Yellow	Environmental Pollutants Cytochrome P450	Others
Acid Yellow 36 (Metanil Yellow) is an azo dye and a pH indicator. Acid Yellow 36 changes its color from red at pH 1.2 to yellow at pH 2.3. Acid Yellow 36 is used in the leather, paper and textile industries. Acid Yellow 36 acts as a bifunctional inducer of specific isozymes of P-450 and cytosolic enzymes .

HY-D1401

OG 488, acid	Fluorescent Dye	Others
OG 488, acid, a fluorescent pH indicator, has many applications in biochemistry and neurosciences .

HY-128545

Nitrazine yellow Nitrazine paper; Phenaphthazine	Biochemical Assay Reagents	Others
Nitrazine yellow (Nitrazine paper; Phenaphthazine) is a pH indicator. The color of Nitrazine yellow changes from yellow to blue in the pH range from 6.0 to 7.0. Nitrazine yellow is a kind of biological materials or organic compounds that are widely used in life science research .

HY-D1677

5(6)-Carboxynaphthofluorescein	Fluorescent Dye	Others
5(6)-Carboxynaphthofluorescein is a pH-dependent fluorophore. 5(6)-Carboxynaphthofluorescein shows good sensitivity in an alkaline pH range and it can be exploited in the construction of fiber-optic pH sensors. 5(6)-Carboxynaphthofluorescein can be used as a fluorescent pH indicator (Ex/Em=593/668 nm) .

HY-D0228

4-(4-Nitrophenylazo)resorcinol Azo Violet; Magneson I	Fluorescent Dye	Others
4-(4-Nitrophenylazo)resorcinol (Azo Violet) is an azo purple dye used experimentally as a pH indicator, showing yellow when the pH value is lower than 11 and purple when the pH value is higher than 13. In slightly alkaline or alkaline environments, it also turns dark blue in the presence of magnesium salts. Azo Violet can also be used to test for the presence of ammonium ions. The color of the ammonium chloride or ammonium hydroxide solution will change depending on the concentration of azo violet used .

HY-D0112

7-Hydroxycoumarin-4-acetic acid	Fluorescent Dye	Others
7-Hydroxycoumarin-4-acetic acid, a pH-indicator dye, is covalently bound to bovine serum albumin (BSA) at the positions of reactive amino groups (λ_max=326 nm) .

HY-W331502

Chlorophenol Red sodium	Fluorescent Dye	Others
Chlorophenol Red sodium is a pH indicator .

HY-D0012A

Bromothymol Blue sodium	Biochemical Assay Reagents	Others
Bromothymol Blue sodium salt is a pH indicator. Storage: protect from light.

HY-D0252

m-Cresol purple	Fluorescent Dye	Others
m-Cresol purple is a pH indicator dye with large cross section and halochromic property in neutral pH range .

HY-118320

Alizarine Yellow R Mordant orange 1	Fluorescent Dye	Others
Alizarine Yellow R (Mordant orange 1), Salicylic acid derivative (HY-B0167), is an azo dye. Alizarine Yellow R is used as a pH indicator and a biological stain in chemical examinations and dyeing industries .

HY-W025785

Methyl yellow Solvent Yellow 2; Dimethyl yellow	Biochemical Assay Reagents	Cancer
Methyl yellow (Solvent Yellow 2) is a pH indicator. Methyl yellow appears red at low pH, and becomes yellow above pH 4.0 .

HY-D0276

m-Cresol purple sodium Metacresol purple sodium	Biochemical Assay Reagents	Others
m-Cresol purple sodium (Metacresol purple sodium) is a pH indicator. m-Cresol purple sodium solution from yellow to blue in the pH range from 7.5 to 9.0 .

HY-D0140

Chromoionophore I ETH 5294	Fluorescent Dye	Others
Chromoionophore I (ETH 5294) is a hydrophobic pH indicator. Chromoionophore I is used as a transmissive or fluorescent probe molecule in many types of hydrophobic sensor membranes. Chromoionophore I is oil-soluble .

HY-D0015

Cresol red, 97%	Fluorescent Dye	Others
Cresol red, 97% is an acidic phenolsulfonphthalein triphenylmethane dye. Cresol red, 97% generates reactive oxygen species and singlet oxygen under ultrasonic irradiation, interacts with bovine serum albumin, alters the structure of bovine serum albumin, and oxidizes the fluorescent amino acid residues of bovine serum albumin. Cresol red, 97% can be decolorized and biodegraded by Absidia spinosa M15, producing phenylacetic acid and benzoic acid metabolites. Cresol red, 97% serves as a pH indicator (orange at pH 1.8-yellow at pH 2.0, yellow at pH 7.0-purple at pH 8.8). Cresol red, 97% can be used to indicate pH, temperature and salinity .

HY-W088071

Litmus	Biochemical Assay Reagents	Others
Litmus is a pH indicator, which is red at pH 4.5 and blue at pH 8.3.

HY-W110789

*Ethyl Orange sodium, indicator* grade**	Biochemical Assay Reagents	Others
Ethyl Orange (sodium), indicator grade is an organic azo compound that can be used as a pH indicator from pH 3.0 to pH 4.8, changing color from red to orange.

HY-D0011

Brom0phenol blue sodium 1 Publications Verification	Biochemical Assay Reagents	Others
Bromophenol blue sodium is a pH indicator. It changes from yellow at pH 3.0 to blue at pH 4.6. Bromophenol blue sodium is also used as a tracking dye to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis .

HY-Y0699R

Methyl red (Standard)	Fluorescent Dye Reference Standards	Others
Methyl red (Standard) is the analytical standard of Methyl red. This product is intended for research and analytical applications. Methyl red is an azo dye that acts as a pH indicator. Methyl red is red and yellow at pH 4.4 and 6.0 respectively .

HY-W110790

Bromocresol purple sodium	Biochemical Assay Reagents	Others
Bromocresol purple sodium is a pH indicator, whose color changes from yellow to purple when the pH increases from 5.2 to 6.8. Bromocresol purple sodium can be used for detecting yeast cells with plasma membrane damage and measuring serum albumin concentrations .

HY-W342120

Phenolphthalein disodium, 95%	Biochemical Assay Reagents	Others
Phenolphthalein (disodium), 95% is a pH indicator.

HY-W145108

Methyl red hydrochloride	Biochemical Assay Reagents	Others
Methyl red hydrochloride is an azo dye that acts as a pH indicator. Methyl red is red and yellow at pH 4.4 and 6.0 respectively .

HY-D1477

5(6)-Carboxyfluorescein diisobutyrate	Fluorescent Dye	Others
5(6)-Carboxyfluorescein diisobutyrate is a protected 5(6)-carboxyfluorescein. 5(6)-carboxyfluorescein is a fluorescence pH indicator .

HY-W016352

2-Hydroxy-5-nitrobenzoic acid, 99% Anilotic acid, 99%	Biochemical Assay Reagents	Others
2-Hydroxy-5-nitrobenzoic acid, 99% is used as an HPLC analytical standard, pH indicator, and heavy metal detection agent, and is also used in the study of phenolic compounds oxidation.

HY-D0023A

Pyranine hydrate HPTS hydrate; Solvent Green 7 hydrate	Fluorescent Dye	Others
Pyranine (HPTS; Solvent Green 7) hydrate is a cell-impermeant pH-sensitive fluorescent indicator. Pyranine hydrate acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine hydrate is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-D0116

Pyranine free acid HPTS free acid; Solvent Green 7 free acid	Fluorescent Dye	Others
Pyranine (HPTS; Solvent Green 7) free acid is a pH-sensitive fluorescent indicator. Pyranine free acid acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine free acid is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-W411215

1,4-Diacetoxy-2,3-dicyanobenzene	Fluorescent Dye	Others
1,4-Diacetoxy-2,3-dicyanobenzene is a cell-permeable fluorescent probe. 1,4-Diacetoxy-2,3-dicyanobenzene crosses the cell membrane and is cleaved by cytosolic esterases to the fluorescent pH indicator 2,3-dicyano-hydroquinone (DCH). 1,4-Diacetoxy-2,3-dicyanobenzene can be used to monitor intracellular pH .

HY-W110784

Ethyl red, 98% Diethyl red, 98%	Biochemical Assay Reagents	Others
Ethyl Red, 98% is a pH indicator.

HY-W025785S1

Methyl yellow-d6 Solvent Yellow 2-d₆; Dimethyl yellow-d₆	Isotope-Labeled Compounds Biochemical Assay Reagents	Cancer
Methyl yellow-d₆ (Solvent Yellow 2-d₆) is the deuterium labeled Methyl yellow (HY-W025785). Methyl yellow (Solvent Yellow 2) is a pH indicator. Methyl yellow appears red at low pH, and becomes yellow above pH 4.0 .

HY-W016352R

2-Hydroxy-5-nitrobenzoic acid, 99% (Standard) Anilotic acid, 99% (Standard)	Biochemical Assay Reagents Reference Standards	Others
2-Hydroxy-5-nitrobenzoic acid, 99% (Standard) is the analytical standard of 2-Hydroxy-5-nitrobenzoic acid, 99%. This product is intended for research and analytical applications. 2-Hydroxy-5-nitrobenzoic acid, 99% is used as an HPLC analytical standard, pH indicator, and heavy metal detection agent, and is also used in the study of phenolic compounds oxidation.

HY-D3036

5-(6)-Carboxy SNAFL-1 SE	Fluorescent Dye	Others
5-(6)-Carboxy SNAFL-1 SE is an amine-reactive succinimidyl ester pH indicator. 5-(6)-Carboxy SNAFL-1 SE can be readily conjugated to peptides, antibodies and other amino-containing molecules such as amino-modified oligos. 5-(6)-Carboxy SNAFL-1 SE can be used for measurement of pH changes between 7-8 (Ex/Em = 490/513 nm) .

Cat. No.	Product Name	Type

HY-D0169

Phenol Red 1 Publications Verification Phenolsulfonephthalein	Fluorescent Dye
Phenol red (Phenolsulfonephthalein) is a pH indicator dye, relying on a distinct color change from pink to yellow in case of a positive reaction .

HY-D0166

Neutral Red	Fluorescent Dye
Neutral Red, a nitrogenous pH-indicator with a pK_i of 6.8, is an indicator for the internal acidification of thylakoids. Neutral Red stains lysosomes red .

HY-133527

OG 488, SE Oregon green 488 succinimidyl ester	Fluorescent Dye
OG 488, SE (Oregon green 488 succinimidyl ester), a fluorescent pH indicator, has many applications in biochemistry and neurosciences .

HY-B1571

Bromophenol blue

Fluorescent Dye

Bromophenol blue is an acid phthalein dye, and it is used as a tracking dye for electrophoresis. Bromophenol blue is also used as a pH indicator, with a transition range of pH 3 to 4.6. Bromophenol blue is used as a sensor for the determination of several compounds including ammonia, drugs, proteins and amino acids. The binding of Bromophenol blue to proteins is accompanied by the appearance of a strong absorbance at 610 nm .

HY-D0012

Bromothymol Blue	Fluorescent Dye
Bromothymol Blue is a pH indicator.

HY-D0023

Pyranine 2 Publications Verification HPTS; Solvent Green 7	Fluorescent Dye
Pyranine (HPTS; Solvent Green 7) is a cell-impermeant pH-sensitive fluorescent indicator. Pyranine acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-D0169A

Phenol Red sodium salt 1 Publications Verification Phenolsulfonephthalein sodium salt	Fluorescent Dye
Phenol red (Phenolsulfonephthalein) sodium salt is a pH indicator dye. Phenol Red sodium salt is also an antagonist of rat P2X1R. Phenol Red sodium salt enhances the halogenating activity of myeloperoxidase. Phenol Red sodium salt shows a distinct color change from pink to yellow in a positive pH reaction .

HY-D1445

LysoSensor PDMPO

1 Publications Verification

Fluorescent Dye

PDMPO, a lysosome pH indicator, is an excellent fluorescent acidotropic reagent for fluorescence imaging. PDMPO is a potent tool with which to study acidic organelles of live cells. PDMPO exhibits pH-dependent dual-excitation and dual-emission spectral peaks. PDMPO produces a blue fluorescence in weakly acidic organelles and shifts to yellow in more acidic lysosomes. (Abs=329 nm; Em=440/540 nm) .

HY-D0219

Thymol blue

Thymolsulphonephthalein

Fluorescent Dye

Thymol blue is a reversible pH indicator that responds to the pH of the solution through structural changes of protonation and deprotonation. Thymol blue is red (HI ^- form) under acidic conditions and blue (I ^2- form) under alkaline conditions. Quantitative detection is achieved through the absorption peak shift (435 nm/596 nm) of the UV-visible spectrum. Thymol blue selectively responds to pH changes, changing from red to yellow at pH 1.2-2.8 and from yellow to blue at pH 8.0-9.6. Thymol blue can be fixed in a silica gel matrix through sol-gel technology to form a solid-state sensor for in-situ pH measurement in the marine environment and acid-base monitoring in the biomedical field[1][2].

HY-D0142

Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium	Fluorescent Dye
Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium is a fluorescent dye and pH indicator, also as a ligand of multifunctional metal-organic framework. Pyrene-1,3,6,8-tetrasulfonic acid tetrasodium has been used to detect CO₂ release .

HY-128369

Acid Yellow 36 Metanil Yellow	Fluorescent Dye
Acid Yellow 36 (Metanil Yellow) is an azo dye and a pH indicator. Acid Yellow 36 changes its color from red at pH 1.2 to yellow at pH 2.3. Acid Yellow 36 is used in the leather, paper and textile industries. Acid Yellow 36 acts as a bifunctional inducer of specific isozymes of P-450 and cytosolic enzymes .

HY-D1401

OG 488, acid	Fluorescent Dye
OG 488, acid, a fluorescent pH indicator, has many applications in biochemistry and neurosciences .

HY-D0228

4-(4-Nitrophenylazo)resorcinol

Azo Violet; Magneson I

Fluorescent Dye

4-(4-Nitrophenylazo)resorcinol (Azo Violet) is an azo purple dye used experimentally as a pH indicator, showing yellow when the pH value is lower than 11 and purple when the pH value is higher than 13. In slightly alkaline or alkaline environments, it also turns dark blue in the presence of magnesium salts. Azo Violet can also be used to test for the presence of ammonium ions. The color of the ammonium chloride or ammonium hydroxide solution will change depending on the concentration of azo violet used .

HY-D0112

7-Hydroxycoumarin-4-acetic acid	Fluorescent Dye
7-Hydroxycoumarin-4-acetic acid, a pH-indicator dye, is covalently bound to bovine serum albumin (BSA) at the positions of reactive amino groups (λ_max=326 nm) .

HY-W331502

Chlorophenol Red sodium	Fluorescent Dye
Chlorophenol Red sodium is a pH indicator .

HY-D0012A

Bromothymol Blue sodium	Fluorescent Dye
Bromothymol Blue sodium salt is a pH indicator. Storage: protect from light.

HY-D0252

m-Cresol purple	Fluorescent Dye
m-Cresol purple is a pH indicator dye with large cross section and halochromic property in neutral pH range .

HY-118320

Alizarine Yellow R Mordant orange 1	Fluorescent Dye
Alizarine Yellow R (Mordant orange 1), Salicylic acid derivative (HY-B0167), is an azo dye. Alizarine Yellow R is used as a pH indicator and a biological stain in chemical examinations and dyeing industries .

HY-D0140

Chromoionophore I ETH 5294	Fluorescent Dye
Chromoionophore I (ETH 5294) is a hydrophobic pH indicator. Chromoionophore I is used as a transmissive or fluorescent probe molecule in many types of hydrophobic sensor membranes. Chromoionophore I is oil-soluble .

HY-D0015

Cresol red, 97%

Fluorescent Dye

Cresol red, 97% is an acidic phenolsulfonphthalein triphenylmethane dye. Cresol red, 97% generates reactive oxygen species and singlet oxygen under ultrasonic irradiation, interacts with bovine serum albumin, alters the structure of bovine serum albumin, and oxidizes the fluorescent amino acid residues of bovine serum albumin. Cresol red, 97% can be decolorized and biodegraded by *Absidia spinosa* M15, producing phenylacetic acid and benzoic acid metabolites. Cresol red, 97% serves as a pH indicator (orange at pH 1.8-yellow at pH 2.0, yellow at pH 7.0-purple at pH 8.8). Cresol red, 97% can be used to indicate pH, temperature and salinity .

HY-D0011

Brom0phenol blue sodium 1 Publications Verification	Fluorescent Dye
Bromophenol blue sodium is a pH indicator. It changes from yellow at pH 3.0 to blue at pH 4.6. Bromophenol blue sodium is also used as a tracking dye to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis .

HY-D1477

5(6)-Carboxyfluorescein diisobutyrate	Fluorescent Dye
5(6)-Carboxyfluorescein diisobutyrate is a protected 5(6)-carboxyfluorescein. 5(6)-carboxyfluorescein is a fluorescence pH indicator .

HY-D0023A

Pyranine hydrate HPTS hydrate; Solvent Green 7 hydrate	Fluorescent Dye
Pyranine (HPTS; Solvent Green 7) hydrate is a cell-impermeant pH-sensitive fluorescent indicator. Pyranine hydrate acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine hydrate is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-D0116

Pyranine free acid HPTS free acid; Solvent Green 7 free acid	Fluorescent Dye
Pyranine (HPTS; Solvent Green 7) free acid is a pH-sensitive fluorescent indicator. Pyranine free acid acts as a class of fluorescent chemosensor for the Cu ⁺ ion. Pyranine free acid is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator (Ex/Em = 450/510 nm) .

HY-W411215

1,4-Diacetoxy-2,3-dicyanobenzene	Fluorescent Dye
1,4-Diacetoxy-2,3-dicyanobenzene is a cell-permeable fluorescent probe. 1,4-Diacetoxy-2,3-dicyanobenzene crosses the cell membrane and is cleaved by cytosolic esterases to the fluorescent pH indicator 2,3-dicyano-hydroquinone (DCH). 1,4-Diacetoxy-2,3-dicyanobenzene can be used to monitor intracellular pH .

HY-D3036

5-(6)-Carboxy SNAFL-1 SE	Fluorescent Dye
5-(6)-Carboxy SNAFL-1 SE is an amine-reactive succinimidyl ester pH indicator. 5-(6)-Carboxy SNAFL-1 SE can be readily conjugated to peptides, antibodies and other amino-containing molecules such as amino-modified oligos. 5-(6)-Carboxy SNAFL-1 SE can be used for measurement of pH changes between 7-8 (Ex/Em = 490/513 nm) .

Cat. No.	Product Name	Type

HY-W040144

Bromocresol green

Biochemical Assay Reagents

Bromocresol green is a pH-sensitive triphenylmethane dye commonly used for the determination of protein and albumin in serum. Bromocresol green is a bio-based dye with a yellow-green to blue-green color. Bromocresol green turns yellow (λmax=435 nm, protonated form) when placed in acidic solution (e.g. pH=4.15), and turns blue in basic solution (λmax=615 nm, deprotonated form). Bromocresol green is widely used as a pH indicator in the field of biochemical analysis. In addition, Bromocresol green is also used to detect the concentration of molecules such as creatinine, and to judge the viability of cells .

HY-125457

α-Naphtholbenzein p-Naphtolbenzein	Biochemical Assay Reagents
α-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein is commonly used in experiments such as acid-base neutralization reactions, titration, and pH measurement .

HY-W087928

Bromocresol purple	Biochemical Assay Reagents
Bromocresol purple is a pH indicator, whose color changes from yellow to purple when the pH increases from 5.2 to 6.8. Bromocresol purple can be used for detecting yeast cells with plasma membrane damage and measuring serum albumin concentrations .

HY-128545

Nitrazine yellow Nitrazine paper; Phenaphthazine	Biochemical Assay Reagents
Nitrazine yellow (Nitrazine paper; Phenaphthazine) is a pH indicator. The color of Nitrazine yellow changes from yellow to blue in the pH range from 6.0 to 7.0. Nitrazine yellow is a kind of biological materials or organic compounds that are widely used in life science research .

HY-D0252

m-Cresol purple	Biochemical Assay Reagents
m-Cresol purple is a pH indicator dye with large cross section and halochromic property in neutral pH range .

HY-D0276

m-Cresol purple sodium Metacresol purple sodium	Biochemical Assay Reagents
m-Cresol purple sodium (Metacresol purple sodium) is a pH indicator. m-Cresol purple sodium solution from yellow to blue in the pH range from 7.5 to 9.0 .

HY-D0015

Cresol red, 97%

Biochemical Assay Reagents

HY-W088071

Litmus	Biochemical Assay Reagents
Litmus is a pH indicator, which is red at pH 4.5 and blue at pH 8.3.

HY-W110789

*Ethyl Orange sodium, indicator* grade**	Biochemical Assay Reagents
Ethyl Orange (sodium), indicator grade is an organic azo compound that can be used as a pH indicator from pH 3.0 to pH 4.8, changing color from red to orange.

HY-D0011

Brom0phenol blue sodium 1 Publications Verification	Biochemical Assay Reagents
Bromophenol blue sodium is a pH indicator. It changes from yellow at pH 3.0 to blue at pH 4.6. Bromophenol blue sodium is also used as a tracking dye to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis .

HY-Y0699R

Methyl red (Standard)	Biochemical Assay Reagents
Methyl red (Standard) is the analytical standard of Methyl red. This product is intended for research and analytical applications. Methyl red is an azo dye that acts as a pH indicator. Methyl red is red and yellow at pH 4.4 and 6.0 respectively .

HY-W110790

Bromocresol purple sodium	Biochemical Assay Reagents
Bromocresol purple sodium is a pH indicator, whose color changes from yellow to purple when the pH increases from 5.2 to 6.8. Bromocresol purple sodium can be used for detecting yeast cells with plasma membrane damage and measuring serum albumin concentrations .

HY-W342120

Phenolphthalein disodium, 95%	Biochemical Assay Reagents
Phenolphthalein (disodium), 95% is a pH indicator.

HY-W145108

Methyl red hydrochloride	Biochemical Assay Reagents
Methyl red hydrochloride is an azo dye that acts as a pH indicator. Methyl red is red and yellow at pH 4.4 and 6.0 respectively .

HY-W016352

2-Hydroxy-5-nitrobenzoic acid, 99% Anilotic acid, 99%	Biochemical Assay Reagents
2-Hydroxy-5-nitrobenzoic acid, 99% is used as an HPLC analytical standard, pH indicator, and heavy metal detection agent, and is also used in the study of phenolic compounds oxidation.

HY-W110784

Ethyl red, 98% Diethyl red, 98%	Biochemical Assay Reagents
Ethyl Red, 98% is a pH indicator.

HY-W016352R

2-Hydroxy-5-nitrobenzoic acid, 99% (Standard) Anilotic acid, 99% (Standard)	Biochemical Assay Reagents
2-Hydroxy-5-nitrobenzoic acid, 99% (Standard) is the analytical standard of 2-Hydroxy-5-nitrobenzoic acid, 99%. This product is intended for research and analytical applications. 2-Hydroxy-5-nitrobenzoic acid, 99% is used as an HPLC analytical standard, pH indicator, and heavy metal detection agent, and is also used in the study of phenolic compounds oxidation.

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