5-Methylisoxazole-4-carboxylic Acid , 98% , 42831-50-5

CAS NO.：42831-50-5

Empirical Formula: C5H5NO3

Molecular Weight: 127.1

MDL number: MFCD00955655

EINECS: 1312995-182-4

PRODUCT Properties

• Melting point: 144-148 °C(lit.)
• Boiling point: 308.3±22.0 °C(Predicted)
• Density: 1.348±0.06 g/cm3(Predicted)
• storage temp.: Sealed in dry,Room Temperature
• solubility: DMSO (Slightly), Methanol (Slightly)
• form: Solid
• pka: 2.85±0.25(Predicted)
• color: White to Pale Brown
• BRN: 116000

Description and Uses

5-Methylisoxazole-4-carboxylic Acid (Leflunomide EP Impurity D) is an intermediate for synthesis of Leflunomide (L322750). Herbicidal activities towards Digitaria ciliaris.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H315-H319-H335
• Precautionary statements: P261-P280a-P304+P340-P305+P351+P338-P405-P501a
• Hazard Codes: Xi,F
• Risk Statements: 36/37/38-37/38-36-10
• Safety Statements: 22-26-36/37/39-36-16
• WGK Germany: 3
• HazardClass: IRRITANT
• HS Code: 29349990