FD&C blue 2

Agent Name
FD&C blue 2
Alternative Name
Indigo carmine
CAS Number
Major Category
FD&C blue 2 formula graphical representation
Indigo carmine; (delta2,2'-Biindoline)-5,5'-disulfonic acid, 3,3'-dioxo-, disodium salt; 12070 Blue; 1311 Blue; 1H-Indole-5-sulfonic acid, 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, disodium salt; 2-(1,3-Dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic acid, disodium salt; A.F. Blue No. 2; Acid Blue 74; Acid Blue W; Acid Leather Blue IC; Airedale Blue IN; Amacid Brilliant Blue; Aniline Carmine powder; Atul Indigo Carmine; Bucacid indigotine B; C.I. 73015; C.I. 75781; C.I. Acid Blue 74; C.I. Food Blue 1; C.I. Food Blue 1, disodium salt; C.I. Natural Blue 2; CI 73015; Canacert Indigo Carmine; Carmine Blue (biological stain); Cilefa Blue R; Dinatrium 3,3'-dioxo-(delta2,2'-biindolin)-5,5'-disulfonat; Dinatrium indigolin-5,5'-disulfonat; Disodium 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-; 2,3-dihydro-3-oxo-1H-indole-5-sulfonate; Disodium 3,3'-dioxo-(delta(sup 2,2')-biindoline)-5,5'-disulfonate; Disodium 3,3'-dioxo-(delta2,2'-biindoline)-5,5'-disulfonate; Disodium 5,5'-disulfoindigo; Disodium 5,5'-indigotin disulfonate; Disodium indigo-5,5-disulfonate; Disodium salt of 1-indigotin-S,S'-disulfonic acid; Disodium salt of 1-indigotin-S,S'-disulphonic acid; Dolkwal Indigo Carmine; E 132; Edicol Supra Blue X; FD and C Blue No. 2; Food Blue 1; Food Blue 2; Food Blue No. 1; Food Blue No. 2; Grape Blue A; Grape Blue A Geigy; HD Indigo Carmine; HD Indigo Carmine Supra; Hexacert Blue No. 2; Hexacol Indigo Carmine Supra; Indigo Carmine; Indigo Carmine (biological stain); Indigo Carmine A; Indigo Carmine AC; Indigo Carmine BP; Indigo Carmine Conc. FQ; Indigo Carmine X; Indigo Carmine disodium salt; Indigo Carmine powder; Indigo disulfonate (biological stain); Indigo extract; Indigo-karmin [German]; Indigocarmin; Indigotin I; Indigotin-5,5'-disulfonic acid disodium salt; Indigotine; Indigotine B; Indigotine Blue LZ; Indigotine Conc. Powder; Indigotine Extra Pure A; Indigotine Extra Pure A; Indigotine I; Indigotine IA; Indigotine Lake; Indigotine N; Indigotine conc. Powder; Indigotine disodium salt; Indocarmine F; Intense Blue; L Blue Z 5010; L-Blau 2 [German]; Maple Indigo Carmine; Mitsui Indigo Carmine; Modr Kysela 74 [Czech]; Modr Pigment 63 [Czech]; Modr Potravinarska 1 [Czech]; Murabba; Sachsischblau; San-ei Indigo Carmine; Schultz Nr. 1309 [German]; Sodium 5,5'-indigotindisulfonate; Sodium indigo-5,5'-bisulfonate; Sodium indigotindisulfonate; Soluble indigo; Sumitomo Wool Blue SBC; Usacert Blue No. 2; [ChemIDplus]
Other Dyes
Water soluble, dark blue powder; [CHEMINFO]
"3,3'-Dioxo-(delta-2,2'-biindoline)-5,5'-disulfonic acid disodium salt. An indolesulfonic acid that is used as a dye in renal function testing and as a reagent for the detection of nitrates and chlorates and in the testing of milk." [ChemIDplus]
Occupational asthma documented in a worker in the food industry with positive broncho-provocation test; [Malo]
Biomedical References

Adverse Effects


Diseases, Processes, and Activities Linked to This Agent


Occupational diseases associated with exposure to this agent: