What is "indophenol"

Indophenol \In`do*phe"nol\, n. [Indigo + phenol.] (Chem.) Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper, the parent compound of the dye series, is a quinonimine derivative with the formula C12H9NO2.

n. (context organic chemistry English) Any of a class of blue or green dyes produced by oxidation of phenols and aromatic diamines

Indophenol is an organic compound with the formula OCHNCHOH. It is deep blue dye that is the product of the Berthelot's reaction, a common test for ammonia. The indophenol group, with various substituents in place of OH and various ring substitutions, is found in many dyes used in hair coloring and textiles.