Benzoic acid,2,4-dihydroxy-5-(2-(2-hydroxy-3-nitro-5-sulfophenyl)diazenyl)-,sodium salt (1:2), DISODIUM 2,4-DIHYDROXY-5-[(2-HYDROXY-3-NITRO-5-SULFONATOPHENYL)AZO]BENZOATE, Disodium 2,4-dihydroxy-5-((2-hydroxy-3-nitro-5-sulphonatophenyl)azo)benzoate, Benzoic acid,2,4-dihydroxy-5-((2-hydroxy-3-nitro-5-sulfophenyl)azo)-,disodium salt, EINECS 276-412-1,