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Indigo Carmine

Product name	Indigo Carmine
Alias	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; Indigotindisulfonate Sodium [USAN]; 5,5-Indigodisulfonic acid, disodium salt; Acid Blue 74; disodium 5,5-(2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one)disulphonate; disodium 5,5-indigodisulphonate; E 132; Indigo-5,5-disulphonic acid disodium salt; 1H-indole-5-sulfonic acid, 2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, disodium salt, (2E)-; disodium (2E)-3,3'-dioxo-1,1',3,3'-tetrahydro-2,2'-biindole-5,5'-disulfonate
English name	Indigo Carmine
Alias	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; Indigotindisulfonate Sodium [USAN]; 5,5-Indigodisulfonic acid, disodium salt; Acid Blue 74; Indigo-5,5-disulphonic acid disodium salt;
CAS RN	860-22-0
EINECS No.	212-728-8
Molecular formula	C16H8N2Na2O8S2
Molecular weight	466.3529
Molecular structure
Solubility	1 g/100 mL (25℃)
Uses	In oxidizing agent, reducing agent, indicating agent and biological dye

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