Description General description N-(1-Naphthyl)ethylenediamine dihydrochloride is a hygroscopic analytical reagent generally suitable for determination of drugs, pharmaceuticals with free primary aromatic amino group, sulpha drugs and local anaesthetics. It may decompose on exposure to light. Application N-(1-Naphthyl)ethylenediamine dihydrochloride monomethanolate may be used to study antimicrobial effects against bacteria. Other Notes Reagent used in the simultaneous spectrophotometric determination of nitrite and nitrate by flow injection analysis