Cresol Purple Chemical Properties

Melting point:

>250°C

Boiling point:

577.5±50.0 °C(Predicted)

Density 

1.404±0.06 g/cm3(Predicted)

storage temp. 

room temp

solubility 

Very slightly soluble in water, ethanol; soluble in methanol

pka

1.51, 8.32(at 25℃)

form 

Liquid

color 

Dark green

PH Range

1.2 (red) - 2.8 (yellow) and 7.4 (yellow) - 9.0 (purple)

Water Solubility 

Soluble in water and sodium hydroxide solution. Slightly soluble in alcohol.

λmax

579nm, 371nm

Merck 

14,2577

BRN 

350314

Stability:

Stable. Incompatible with strong oxidizing agents.

Major Application

Fuel cells, sensors, display device, falsification-proof security paper, inks, correction fluid, paints, detection of electrophilic gases, lubricants, cement products, packaging system, adhesive, cosmetics, food storage, determining glucose in dialysis solution, screening of cat diseases, detecting carbohydrates, oral hygiene products

EPA Substance Registry System

Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[3-methyl- (2303-01-7)

Safety Information

Safety Statements 

24/25

WGK Germany 

WGK 2 water endangering

TSCA 

Yes

HS Code 

2934 99 90

MSDS

• Language:English Provider:ACROS
• Language:English Provider:ALFA

Cresol Purple Usage And Synthesis

Chemical Properties

green crystalline powder

Uses

m-Cresol Purple acts as a pH indicator dye. It plays an important role in spectrophotometric pH measurements. It operates in the pH ranges 1.2 - 2.8 (red to yellow) and 7.4 - 9.0 (yellow to violet). Further, it is employed to stain epithelial cells and proteins.

Uses

Acid-base indicator.

Biochem/physiol Actions

m-Cresol purple is a pH indicator. It changes from red (pH 1.2) to yellow (2.8) and yellow (7.4) to purple (9.0).

Cresol Purple(2303-01-7)Related Product Information

• Cresol
• Amylmetacresol
• 3-Bromophenol
• Bromocresol green
• p-(2-Methoxyethyl) phenol
• 3,4-Dimethylaniline
• m-Cresol
• BCP
• Dimethyl sulfone
• 2,6-Dimethylphenol
• Guaiacol
• CRESYL VIOLET ACETATE
• 4-Methoxyphenol
• Sulfosulfuron
• 3-Methoxyphenol
• o-Cresolphthalein
• p-Cresol
• 3-Aminophenol