Isoxazole-5-carboxylic acid
异噁唑-5-甲酸
Also known as: 5-Isoxazolecarboxylic acid, 5-Carboxyisoxazole, 5-Carboxy-1,2-oxazole, 1,2-Oxazole-5-carboxylic acid, Isoxazol-5-carbonsaeure, MFCD00156151
Isoxazole-5-carboxylic acid (CAS 21169-71-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H3NO3 and a molecular weight of 113.072 g/mol. It is also known as 5-Isoxazolecarboxylic acid, 5-Carboxyisoxazole and 5-Carboxy-1,2-oxazole. Key properties include a melting point of 144-148 °C(lit.), a boiling point of 321.2±15.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 148.1±20.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21169-71-1
- Jingsj CID
- J-32156-7
- Molecular Formula
- C4H3NO3
- Chinese Name
- 异噁唑-5-甲酸
- Molecular Weight
- 113.072 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 144-148 °C(lit.) |
|---|---|
| Boiling Point | 321.2±15.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 148.1±20.4 °C |
Frequently Asked Questions
What is the CAS number of Isoxazole-5-carboxylic acid?
The CAS number of Isoxazole-5-carboxylic acid is 21169-71-1.
What are the molecular formula and molecular weight of Isoxazole-5-carboxylic acid?
Isoxazole-5-carboxylic acid has molecular formula C4H3NO3 and molecular weight 113.072 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Isoxazole-5-carboxylic acid (CAS 21169-71-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32156-7 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.