o-(2-amino-1-naphthylazo)toluene, Oil Yellow OB Pure, Oil Yellow OB, Jaune OB, Cerisol Yellow TB, C Yellow 4, FD and C Yellow No. 4, 1-o-Tolylazo-[2]naphthylamin, 1-o-tolylazo-[2]naphthylamine, Dolkwal Yellow OB, 1-(2'-methylbenzeneazo)-2-amino-naphthalene, C.I. Food Yellow 11, C.I. Solvent Yellow 6, Yellow OB