2-Naphthalenesulfonic acid,6-amino-4-hydroxy-5-((2-(phenoxysulfonyl)phenyl)azo)-,monosodium salt, SODIUM 6-AMINO-4-HYDROXY-5-[[2-(PHENOXYSULFONYL)PHENYL]AZO]NAPHTHALENE-2-SULFONATE, 2-Naphthalenesulfonic acid,6-amino-4-hydroxy-5-(2-(2-(phenoxysulfonyl)phenyl)diazenyl)-,sodium salt (1:1), Sodium 6-amino-4-hydroxy-5-((2-(phenoxysulphonyl)phenyl)azo)naphthalene-2-sulphonate, EINECS 274-392-9,