Colour Index Database

Colour Index

  • Name   CAS No.   C.I. No.
Name: Indigotindisulfonate Sodium [USAN]
CAS: 860-22-0
C.I. No.: C.I. 75781
Synonyms 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
Molecular Formula C16H8N2Na2O8S2
Molecular Weight 466.3529
InChI InChI=1/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2/b14-13+;;
CAS Registry Number 860-22-0
EINECS 212-728-8
Molecular Structure 860-22-0 Indigo Carmine
Water solubility 1 g/100 mL (25���)
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