Synonyms: disodium 6-[(4-aminophenyl)azo]naphthalene-1,3-disulphonate;1,3-Naphthalenedisulfonic acid, 6-((4-aminophenyl)azo)-, disodium salt;1,3-Naphthalenedisulfonic acid, 6-((p-aminophenyl)azo)-, disodium salt;1,3-Naphthalenedisulfonic acid, 6-(2-(4-aminophenyl)diazenyl)-, sodium salt (1:2);Einecs 267-541-4