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

CONGO RED ACS

Synonyms:				Direct Red 28; C.I. 22120

CAS No:				573-58-0

Chemical Formula:			C32H22N6O6S2Na2

Formula Weight:			696.67

Appearance:				Dark red to reddish-brown powder

Clarity of Solution:			Passes Test

Aqueous solubility:		Soluble

Visual Transition Interval:	From pH 3.0 (blue) 
To      pH 5.2 (red)

Loss on drying:			3.0 % maximum	

Effective: 01/26/09