Synonyms: 8-[(4-amino-o-tolyl)azo]naphthalene-1,3-disulphonic acid, sodium salt;8-[(4-Amino-2-methylphenyl)azo]naphthalene-1,3-disulfonic acid/sodium,(1:x) salt;1,3-Naphthalenedisulfonic acid, 8-((4-amino-2-methylphenyl)azo)-, sodium salt;1,3-Naphthalenedisulfonic acid, 8-(2-(4-amino-2-methylphenyl)diazenyl)-, sodium salt (1:);Einecs 268-482-7