1-(4-Sulfophenyl)-3-methyl-5-pyrazolone , 98% , 89-36-1

Synonym(s):
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one;4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid

CAS NO.：89-36-1

Empirical Formula: C10H10N2O4S

Molecular Weight: 254.26

MDL number: MFCD00020756

EINECS: 201-901-3

PRODUCT Properties

• Melting point: >252 °C (dec.) (lit.)
• Density: 1.4456 (rough estimate)
• vapor pressure: 0.001Pa at 20℃
• refractive index: 1.5650 (estimate)
• storage temp.: Sealed in dry,Room Temperature
• form: Powder
• pka: pKa 4.90 (H2O t = 37 I = 0.15) (Uncertain)
• color: White to Orange to Green
• Water Solubility: 5 g/L (20 ºC)
• BRN: 619424
• InChIKey: CWJQQASJVVAXKL-UHFFFAOYSA-N
• LogP: -2.04 at 23℃ and pH7

Description and Uses

1-(4-Sulfophenyl)-3-methyl-5-pyrazolone (4-(3-methyl-5-oxo-2-pyrazolin-1-yl) benzoic acid) was used for pre-column derivatization of carbohydrates. It was also used as derivatization reagent in determination of oligosides, mannose and galactose obtained by degradation of galactomannans.

Safety

• Symbol(GHS): GHS05
• Signal word: Danger
• Hazard statements: H314
• Precautionary statements: P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
• Hazard Codes: C
• Risk Statements: 34
• Safety Statements: 26-36/37/39-45
• RIDADR: UN 1759 8/PG 2
• WGK Germany: 1
• HazardClass: 8
• PackingGroup: II
• HS Code: 29331990