S P E C I F I C A T I O N S

CHLOROPHENOL RED

CAS No.:				4430-20-0

FORMULA:				C19H12Cl2O5S

F.W.:					423.27

Appearance:			Red to Green or Red-Brown crystalline powder

Identification (IR):		To conform to standard

Visual Transition			4.8-5.2 pH		Yellow
Interval:				6.4-6.8 pH		Violet Red/ Purple

Specific Extintion E:		>1000
(1% / 1cm) @ 575nm
in 0.1 N NaOH

Loss on drying:			8% maximum
(110° C (1 hr.)

Solubility in alcohol:		Clear
(0.1% in ETOH) 

Effective: 11/30/18