Synonyms: 7-hydroxy-8-[[4-(phenylazo)phenyl]azo]naphthalene-1,3,6-trisulphonic acid, compound with bis(cyclohexyl)amine;C.I.27306; (8E)-7-oxo-8-[(4-phenyldiazenylphenyl)hydrazinylidene]naphthalene-1,3,6-trisulfonic acid;N-cyclohexylcyclohexanamine;C.I.Solvent Red 31;Solvent Red 31;