5-Methylisoxazole-4-carboxylic acid
5-甲基异噁唑-4-甲酸
Also known as: 5-Methyl-4-isoxazolecarboxylic acid, 5-Methyl-1,2-oxazole-4-carboxylic acid, 4-Carboxy-5-methylisoxazole, Leflunomide Impurity 4, Leflunomide Impurity D, MFCD00955655, T5NOJ C1 DVQ
- CAS No.
- 42831-50-5
- Jingsj CID
- J-3524-4
- Molecular Formula
- C5H5NO3
- Chinese Name
- 5-甲基异噁唑-4-甲酸
- Molecular Weight
- 127.098 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
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Request a quotePhysicochemical Properties
| Melting Point | 144-148 °C(lit.) |
|---|---|
| Boiling Point | 308.3±22.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 140.3±22.3 °C |
Frequently Asked Questions
What is the CAS number of 5-Methylisoxazole-4-carboxylic acid?
42831-50-5
What are the molecular formula and molecular weight of 5-Methylisoxazole-4-carboxylic acid?
C5H5NO3, molecular weight 127.098 g/mol
Data compiled from public chemical databases and supplier catalogs; verify specifications with suppliers before purchase. · Last updated: 8/21/2026