Product Name Indigo Carmine
Colour Shade Acid Blue 74
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
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 matters, percent by mass
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
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