amidol

noun Chemistry.

1. a colorless, crystalline powder, C6H8N2O⋅2HCl, derived from phenol, used chiefly as a photographic developer.

noun

1. trademark a grey to colourless soluble crystalline solid that is used as a photographic developer; 2,4-diaminophenol dihydrochloride. Formula: C 6 H 3 (NH 2) 2 (OH).2HCl