Synonyms: Thiosulfuricacid (H2S2O3),S-[2-[[[4-[[1-[[(2,4-dimethoxyphenyl)amino]carbonyl]-2-oxopropyl]azo]phenyl]sulfonyl]amino]ethyl]ester, monosodium salt (9CI); Thiosulfuric acid, S-ester with2-[[p-[(2-mercaptoethyl)sulfamoyl]phenyl]azo]-2',4'-dimethoxyacetoacetanilide,monosodium salt (8CI); Sodium2-[4-[[1-[(2,4-dimethoxyphenyl)carbamoyl]acetonyl]azo]benzenesulfonamido]ethylthiosulfate