Indigo Carmine

Specification
Product Name Indigo Carmine
Colour Shade
Synonyms Acid Blue 74
Chemical Name Disodium 3,3′-dioxo-2,2′-bi-indolylidene-5,5′-disulphonate
C.I. No 73015
C.I. Name Food Blue 1
FDA Status FD&C Blue #2
CAS No. 860-22-0
EINECS No. 212-728-8
E. NUMBER E-132
Test EEC (Limit)
Total colouring matters calculated as the sodium salt, percent by mass. Min. 85
Water insoluble matter, percent by mass. Max. 0.20
Combined ether extract, percent by mass. Max. 0.20
Unsulfonated Primary aromatic amines, percent by mass. Max. 0.01
Subsidiary dyes, percent by mass. Max. 1
Total organic compound other than colouring matter
Isatin-5-sulfonic acid,
5-sulfoanthranilic acid
Anthranilic acid
Max. 0.50
Heavy metals as pb(mg/kg) Max. 40
Arsenic (mg/kg.) Max. 3
Lead (mg/kg.) Max. 2
Mercury (mg/kg.) Max. 1
Cadmium (mg/kg.) Max. 1