Mordant Red 39;Mordant red 39 (C.I. 18885);C.I.Mordant Red 39:C.I.18885;sodium 2-[[[3-[4,5-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]phenyl]sulphonyl]amino]benzoate;sodium 2-[[[3-[4,5-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]phenyl]sulphonyl]amino]benzoate;sodium,2-[[3-[3-methyl-4-[(2E)-2-(4-nitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-5-oxo-4H-pyrazol-1-yl]phenyl]sulfonylamino]benzoate