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

ALKALI BLUE 6B, C.I. 42766

Synonyms:				Acid Blue 110, Acid Blue 119

CAS No.:				1324-76-1

Formula:				C37H29N3O3S

Formula Weight:			573.65

Appearance:			Brownish Black to Dark blue powder

Dye content:			50% Minimum
(By Spectrophotometry)

Absorptivity 1%/1cm,		730 minimum
(MeOH + 1ml 1N HCL)
at λ max. 594.6 nm

Visual transition interval:		From pH   9.4 (blue)
To     pH 14.0 (red)

Solubility (0.1% in Water):	Blue solution

Loss on drying:			6% maximum

Effective: 02/04/2019