Indigo

Synonyms

(2,2'-Biindoline)-3,3'-dione; 11669 Blue; 2-(1,3-Dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one; 3H-Indol-3-one, 2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-; Blue No. 201; C.I. 73000; C.I. Vat Blue 1; CI 73000; CI Pigment Blue 66; CI Vat Blue 1; Cystoceva; D & C Blue No. 6; D and C Blue No. 6; D&C Blue No. 6; Diindogen; Indigo; Indigo (VAN); Indigo Blue; Indigo Ciba; Indigo Ciba SL; Indigo J; Indigo N; Indigo NAC; Indigo P; Indigo PLN; Indigo Pure BASF; Indigo Pure BASF Powder K; Indigo VS; Indigo nacco; Indigo powder W; Indigo synthetic; Indigotin; Lithosol Deep Blue B; Lithosol Deep Blue V; Mitsui Indigo Pure; Mitsui indigo paste; Modr Kypova 1 [Czech]; Monolite Fast Navy Blue BV; Pigment Blue 66; Synthetic indigo; Synthetic indigo TS; Vat Blue 1; Vulcafix Blue R; Vulcafor Blue A; Vulcanosine Dark Blue L; Vulcol Fast Blue GL; Vynamon Blue A; delta(sup 2,2')-Bipseudoindoxyl; delta2,2'-Bipseudoindoxyl; (delta(sup 2,2')-Biindoline)-3,3'-dione; (delta2,2'-Biindoline)-3,3'-dione (8CI); 2-(1,3-Dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one; [ChemIDplus]

Category

Other Dyes

Description

Dark-blue solid with coppery shine; [HSDB]

Sources/Uses

Used as a dye and dye intermediate; [INCHEM] Used in paint and as an analytical reagent; [HSDB]

Comments

A skin and mucous membrane irritant; [CAMEO]

Biomedical References

9E-13 mm Hg

Explanatory Notes

mp = 250 deg C; [MSDSonline]

will not burn

Processes

Industrial Processes with risk of exposure:

• Painting (Pigments, Binders, and Biocides)
• Textiles (Printing, Dyeing, or Finishing)