disodium 4-[5-amino-4-[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-3-methyl-1H-pyrazol-1-yl]benzenesulphonate

4-[5-Amino-4-[2-methoxy-5-[2-(sodiosulfooxy)ethylsulfonyl]phenylazo]-3-methyl-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt

4-[4-[2-Methoxy-5-[2-(sodiosulfooxy)ethylsulfonyl]phenylazo]-3-methyl-5-amino-1H-pyrazole-1-yl]benzenesulfonic acid sodium salt

4-[4-[2-Methoxy-5-[[2-(sodiooxysulfonyloxy)ethyl]sulfonyl]phenylazo]-3-methyl-5-amino-1H-pyrazole-1-yl]benzenesulfonic acid sodium salt

Sulfuric acid sodium=2-[[3-[1-[4-(sodiooxysulfonyl)phenyl]-3-methyl-5-amino-1H-pyrazole-4-ylazo]-4-methoxyphenyl]sulfonyl]ethyl ester salt