Synonyms: 1-Naphthalenesulfonic acid, 4-amino-, diazotized, coupled with diazotized 8-amino-2-naphthalenesulfonic acid and resorcinol, potassium sodium salts;1-Naphthalenesulfonic acid, 4-amino-, diazotized, coupled with diazotized 8-amino-2-naphthalenesulfonic acid and resorcinol, potassium sodium salts