Basic

CAS No.	89-36-1
Product Name	3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
Synonyms	3-Methyl-1-(4-sulfophenyl)-5-pyrazolone; 4-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-benzenesulfonic acid; 1-(4-Sulfophenyl)-3-methyl-5-pyrazolone; 4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid; 4-(3-methyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid; 4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonate; 1-(4'-sulfonylphenyl)-3-methyl-5-pyrazolone; SMP; 1-(4-Sulphophenyl)-3-Methyl-5-Pyrazolone
Molecular Formula	C10H9N2O4S
Molecular Weight	253.255

Physical property

Melting point	>252℃ (dec.)
Water solubility	5 g/L (20℃)

Hazard Symbols	C:Corrosive;
Risk Codes	R34:;
Safety Description	S26:; S36/37/39:; S45:;