1,4-Benzenediamine, N,N-dimethyl-, dihydrochloride 103813-59-8 536-46-9 99-98-9 Dimethyl-p-phenylenediamine hydrochloride EINECS 208-635-7 N,N-Dimethyl-p-phenylenediamine dihydrochloride N,N-Dimethylbenzene-1,4-diamine dihydrochloride USAF EK-7423 p-Dimethylaminoaniline dihydrochloride p-Phenylenediamine, N,N-dimethyl-, dihydrochloride