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

EVANS BLUE
(C. I. 23860)

Synonyms:				C.I. 23860; Direct Blue 53

CAS No:				314-13-6

Chemical Formula:			C34H24N6Na4O14S4

Formula Weight:			960.82

Description:				Dark brown to black to brownish-red to purple crystalline powder

Loss on drying (110°C/1hr):	< 10% 

Solubility (0.1% H2O):		Clear blue solution

Assay on absorptivity bases:	>85%

Absorptivity 1%/1cm
At Lambda Max 608 nm:		>650

Effective: 01/16/09