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Cresol Purple

Cresol Purple

Product Name Cresol Purple
CAS NO 2303-01-7
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Cresol Purple

Description :

 

 

Chemical Name

Cresol Purple

Another name

m-Cresol Purple

CAS No.

2303-01-7

Molecular formula

C21H18O5S

EINECS No.

218-960-6

Molecular weight

382.43

Molecular Structure

Details

Appearance: Tiny brown crystal powder

pH change range:

1.2(pink)~2.8(yellow); 

7.4(brownish yellow)~9.0(purple).

Max Absorption wavelength(nm):

λ1(PH1.2)   526-529;

λ2(PH2.8)   431-437;

λ3(PH7.4)   431-437;

λ4(PH9.0)   576-580.

Mass absorption coefficient  L/(cm·g)

α(λ1,PH1.2, Dry sample)    80-94;

α(λ2,PH2.8, Dry sample)    40-46;

α(λ3PH7.4, Dry sample)     39-45;

α(λ4,PH9.0, Dry sample)    75-86.

Solubility in Ethanol: Pass

Loss on drying: 1.0% max.

Main Application

sulfonylurea indicator, used as pH indicator.