135-52-4 2-(1-(2-Hydroxy-5-sulfophenyl)-3-phenyl-5-formazano)benzoic acid 2-(1-(2-Hydroxy-5-sulphophenyl)-3-phenyl-5-formazano)benzoic acid Benzoic acid, 2-((((2-hydroxy-5-sulfophenyl)azo)phenylmethylene)hydrazino)- Benzoic acid, 2-(1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazano)- EINECS 205-197-9 Zincon