1,4-Benzenediamine, N,N-diethyl-, ethanedioate (2:1) 62637-92-7 77509-06-9 83691-10-5 93-05-0 Bis(N,N-diethylbenzene-p-diamine) oxalate EINECS 263-662-1 N,N-Diethyl-p-phenylenediamine, oxalic acid salt (1:1)