47834-75-3 5-((4-((((2-Methoxy-4-((3-sulphophenyl)azo)phenyl)amino)carbonyl)amino)phenyl)azo)salicylic acid 72906-22-0 Benzoic acid, 2-hydroxy-5-((4-((((2-methoxy-4-((3-sulfophenyl)azo)phenyl)amino)carbonyl)amino)phenyl)azo)- EINECS 256-338-6