62625-22-3 Benzoic acid, 2-((((2-hydroxy-5-sulfophenyl)azo)phenylmethylene)hydrazino)-, monosodium salt Benzoic acid, 2-(1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazano)-, monosodium salt EINECS 263-651-1 Sodium hydrogen 2-(1-(2-hydroxy-5-sulphonatophenyl)-3-phenyl-5-formazano)benzoate