2,2'-[[3-methyl-4-[[4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]phenyl]imino]bisethyl bis(hydrogen sulphate), sodium salt

2,2'-[[3-Methyl-4-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]phenyl]imino]diethanol bis(hydrogen sulfate)/sodium,(1:x) salt

Ethanol, 2,2'-[[3-methyl-4-[[4-[[2- (sulfooxy)ethyl]sulfonyl]phenyl]azo]phenyl]imino ]bis-, bis(hydrogen sulfate) (ester), sodium salt