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Indigo Carmine
Blue 1
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 No.:
E-132
Tests
Total colouring matters calculated as the sodium salt, percent by mass.
EEC (Limit):
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
Min.
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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