2,5-Bis(2-methoxysulfophenyl)thiazolo(5,4-d)thiazole disodium salt 66037-12-5 66182-98-7 Benzenesulfonic acid, thiazolo(5,4-d)thiazole-2,5-diylbis(methoxy-,disodium salt Disodium thiazolo(5,4-d)thiazole-2,5-diylbis(methoxybenzenesulphonate) EINECS 266-225-3