1,3-Benzenediamine, 4-methyl-, dihydrochloride 1,3-Benzenediamine, 6-methyl-, dihydrochloride 2,4-Diaminotoluene dihydrochloride 636-23-7 95-80-7 Metatolylenediamine dihydrochloride Toluene-2,4-diamine, dihydrochloride