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

BROMOCRESOL PURPLE FREE ACID ACS

Synonyms:				5',5"-Dibromo-o-cresolsulfonephthalein

CAS No.:				115-40-2

Chemical Formula:			C21H16Br2O5S

Formula Weight:			540.24

Appearance:				Grey to light purple or pink to peach to 
                                                            yellow-tan powder

Assay:					94% minimum

Melting Point:			241 - 242 Deg. C

Clarity of solution:			Passes test

Aqueous solubility:		Practically insoluble 

Visual Transition Interval:  	From pH 5.2 (Yellow)
To      pH 6.8 (Purple)

Effective: 11/05/18