5-Methyl-4-isoxazolecarboxylic Acid

5-Methyl-4-isoxazolecarboxylic acid

CAS No.:42831-50-5

[Synonyms]

4-Carboxy-5-methylisoxazole

4-Carboxy-5-methyl-1,2-oxazole

4-Isoxazolecarboxylic acid, 5-methyl

5-Methyl-1,2-oxazole-4-carboxylic acid

5-Methyl-4-isoxazolecarboxylic acid, Tech.

5-Methyl-isoxazol-4-carboxylic acid

Density 1.348 g/cm³

PSA 63.33000

LogP 0.68120

Solubility N/A

Melting Point 144-148 °C(lit.)

Formula C₅H₅NO₃

Boiling Point 308.3 °C at 760 mmHg

Molecular Weight 127.1

Flash Point 140.3 °C

Appearance cream to brown solid

Safety 22-26-36/37/39-16

Risk Codes 36/37/38-10

[Uses]

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

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