SPECIFICATIONS

INDIGO CARMINE

Synonyms:					C.I. 73015

CAS No:					860-22-0

Chemical Formula:				C16H8N2O8S2Na2

Formula Weight:				466.35

Appearance:					Purple Powder

Lambda Max:				608 nm (in water)

Visual Transition Interval:		pH 11.5 (blue) to pH 14.0 (yellow)

Dye Content:				80 % minimum

Effective Date: 01/30/09