Synonym :
2,4,6-Trinitrobenzenesulfonic acid, 5% solution in water; TNBS
Molecular Formula :
C₆H₃N₃O₉S
Picrylsulfonic acid, 5% solution in water is the arenesulfonic acid that is benzenesulfonic acid with three nitro substituents in the 2-, 4- and 6-positions.