Synonyms: Santowhite CL; N,N'-di-2-naphthyl-p-phenylenediamine; 1,4-Bis(2-naphthylamino)benzene; 2-Naphthyl-p-phenylenediamine; 4-13-00-00119 (Beilstein Handbook Reference); Di-beta-naphthyl-p-phenyldiamine; Di-beta-naphthyl-p-phenylenediamine; N,N'-Bis(beta-naphthyl)-p-phenylenediamine; N,N'-Bis(2-naphthyl)-p-phenylenediamine; N,N'-Di-beta-naphthyl-p-phenylenediamine; 1,4-Benzenediamine, N,N'-di-2-naphthalenyl-; N,N'-Di-2-naphthalenyl-1,4-benzenediamine; p-Phenylenediamine, N,N'-(di-2-naphthyl)-; N,N'-di(naphthalen-2-yl)benzene-1,4-diamine