Indigo

Also known as: (2,2'-Biindoline)-3,3'-dione, (2E)-2-(3-Oxo-1,3-dihydro-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one, (delta(2,2’(3h,3’h))-biindole)-3,3’-dione, (delta(2,2’)-biindoline)-3,3’-dione, 3H-Indol-3-one, 2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-, (2E)-, AO201, Blue No 201, C.I. Natural Blue 1, C.I. Pigment Blue 66, D2,2'-Bipseudoindoxyl, EINECS 207-586-9, Indigo J, Indigotin, MFCD00005722, PIGMENT BLUE 66, Vat Dark Blue VB, [D2,2'-Biindoline]-3,3'-dione, [δ2,2'-Biindoline]-3,3'-dione, d&cblueno.6D+C Blue No. 6, d+cblueno6

Indigo (CAS 482-89-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H10N2O2 and a molecular weight of 262.26 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 400.4±45.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 158.2±28.9 °C. It is classified under GHS with signal word Warning and hazard statements H373 — May cause damage to organs through prolonged exposure. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.

482-89-3

Jingsj CID

J-1082223-8

Molecular Formula

C₁₆H₁₀N₂O₂

Molecular Weight

262.26 g/mol

Category

Organic Compounds

Last updated

11/3/2026