Synonyms: 1,4-Benzenediamine,N,N'-bis(methylphenyl)- (9CI); p-Phenylenediamine, N,N'-ditolyl- (8CI); DMPD;N,N'-Bis(methylphenyl)-1,4-benzenediamine;N,N'-Bis(methylphenyl)-p-phenylenediamine;N,N'-Di(monomethylphenyl)-p-phenylenediamine;N,N'-Ditolyl-1,4-phenylenediamine; N,N'-Ditolyl-p-phenylenediamine