trisodium 3-[[4-[[4-chloro-6-[phenyl(sulphonatomethyl)amino]-1,3,5-triazin-2-yl]amino]-5-methoxy-o-tolyl]azo]naphthalene-1,5-disulphonate

3-[[4-[[4-Chloro-6-[phenyl(sulfomethyl)amino]-1,3,5-triazin-2-yl]amino]-5-methoxy-2-methylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt