Synonyms: Benzenesulfonic acid, 4,4',4''-(5-hydroxy-3-oxo-1H-pyrazole-1,2,4(3H)-triyl)tris-, trisodium salt;Sodium salt of enol-1,2,4-tri-(N-sulphophenyl)-3,5-dioxopyrazolidine;AC1MICOK;LS-31983;trisodium 4-[3-hydroxy-5-oxo-1,2-bis(4-sulfonatophenyl)pyrazol-4-yl]benzenesulfonate;59173-51-2