2,2'-((3-Methyl-4-((4-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)phenyl)imino)bisethyl bis(hydrogen sulphate), sodium salt 94157-82-1 EINECS 303-049-9 Ethanol, 2,2'-((3-methyl-4-((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)phenyl)imino)bis-, bis(hydrogen sulfate) (ester), sodium salt