a grey to colourless soluble crystalline solid that is used as a photographic developer; 2,4-diaminophenol dihydrochloride. Formula: C6H3(NH2)2(OH).2HCl
amidol in American English
(ˈæmɪˌdoʊl; ˈæmɪˌdɔl; ˈæmɪˌdɑl)
noun
a colorless crystalline compound, C6H3(NH2)2OH·2HCl, used as a developer in photography