73816-85-0 NAPHTHO(1,2-d)THIAZOLE-1-PROPANESULFONIC ACID, 2-(6-(3-(3-SULFOPROPYL)-4-OXO-2-T NK 2240 Naphtho(1,2-d)thiazole-1-propanesulfonic acid, 2-(6-(3-(3-sulfopropyl)-4-oxo-2-thioxo-5-thiazolidinylene)-2,4-hexadienylidene)-, disodium salt