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Cresol Red

Cresol Red

Product Name Cresol Red
CAS NO 1733-12-6
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Cresol Red

Description :

 

 

Chemical Name

Cresol Red

Another name

o-Cresolsulfonphthalein; 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis(2-methylphenol) S,S-dioxide

CAS No.

1733-12-6

Molecular formula

C21H18O5S

EINECS No.

217-064-2

Molecular weight

382.43

Molecular Structure

Details

Appearance: brownish red crystal

Assay: 80% min.

Max Absorption wavelength, 

λ1(PH6.5): 432~436 nm

λ2(PH8.5): 571~574 nm

Mass absorption coefficient  L/(cm·g)

α1〔λ1(PH6.5)〕49-67 , 

α2〔λ2(PH8.5)〕100-132

Solubility in Ethanol: Pass

Loss on drying: 0.2% max

Residue on ignition (sulfate):3.0%max

Main Application

sulfonylurea indicator, used as pH indicator.