1-(3-Sulfopropyl)-2-((3-(3-sulfopropyl)-2(3H)-benzothiazolylidene)methyl)naphtho(1,2-d)thiazolium hydroxide inner salt, sodium salt 63149-36-0 Naphtho(1,2-d)thiazolium, 1-(3-sulfopropyl)-2-((3-(3-sulfopropyl)-2(3H)-benzothiazolylidene)methyl)-, inner salt, sodium salt