indigo

C₁₆H₁₀N₂O₂
100%
Structural formula of indigo

indigo, [2(2')E]-[2,2'-biindolylidene]-3,3'(1H,1'H)-dione

Indigo is a dark blue crystalline powder used as a dye in jeans, among others.
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Physical characteristics

Molecular mass262
Density1.2 kg/m³
Melting point391 736 664
Solubility (water)0.00377 mmol/L0.99 mg/L
Compound added to the database on June 16, 2021, last modified on August 19, 2022.