2,5-Cyclohexadien-1-imine, 4-diazo-, monohydrochloride, compd. with copper chloride (2:1) 4-Diazo-2,5-cyclohexadien-1-imine hydrochloride compd. with copper chloride (2:1) Cupric chloride additive compound of p-diazoiminobenzene hydrochloride GU5400000