英文别名sodium,4-[3-methyl-4-[(2E)-2-(3-nitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-5-oxo-4H-pyrazol-1-yl]benzenesulfonate; Benzenesulfonic acid,4-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)-,monosodium salt; Benzenesulfonic acid,4-(4,5-dihydro-4-(2-(2-hydroxy-5-nitrophenyl)diazenyl)-3-methyl-5-oxo-1H-pyrazol-1-yl)-,sodium salt (1:1); Sodium p-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonate; 2-Pyrazolin-5-one,4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-1-(p-sulfophenyl)-,sodium salt; sodium p-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonate; Acid mordant Orange 3; Benzenesulfonic acid, 4-4,5-dihydro-4-(2-hydroxy-5-nitrophenyl)azo-3-methyl-5-oxo-1H-pyrazol-1-yl-, monosodium salt; 4-[4,5-Dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid sodium salt; Sodium 4-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonate 
