1,2-Benzenediamine, 4-nitro-, dihydrochloride 4-NITRO-1,2-BENZENEDIAMINE DIHYDROCHLORIDE 4-Nitro-o-phenylenediamine HCl 4-Nitrobenzene-1,2-diamine dihydrochloride 6219-77-8 EINECS 228-293-2 Fourrine 4G HSDB 6234 o-Phenylenediamine, 4-nitro-, dihydrochloride