4-Hydroxybut-2-ynoic acid
4-羟基丁-2-炔酸
Also known as: 4-Hydroxy-2-butynoic acid, 2-Butynoic acid, 4-hydroxy-, 4-HYDROXY-BUT-2-YNOIC ACID, Hydroxytetrolic acid, NSC 620042, g-Hydroxytetrolic acid, hydroxy-but-2-ynoic acid
4-Hydroxybut-2-ynoic acid (CAS 7218-52-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H4O3 and a molecular weight of 100.07300 g/mol. It is also known as 4-Hydroxy-2-butynoic acid, 2-Butynoic acid, 4-hydroxy- and 4-HYDROXY-BUT-2-YNOIC ACID. Key properties include a melting point of 115-116 °C, a boiling point of 319.2ºC at 760 mmHg, a density of 1.429 g/cm3 and a flash point of 161ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 7218-52-2
- Jingsj CID
- J-1161892-8
- Molecular Formula
- C4H4O3
- Chinese Name
- 4-羟基丁-2-炔酸
- Molecular Weight
- 100.07300 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 115-116 °C |
|---|---|
| Boiling Point | 319.2ºC at 760 mmHg |
| Density | 1.429 g/cm3 |
| Flash Point | 161ºC |
Frequently Asked Questions
What is the CAS number of 4-Hydroxybut-2-ynoic acid?
The CAS number of 4-Hydroxybut-2-ynoic acid is 7218-52-2.
What are the molecular formula and molecular weight of 4-Hydroxybut-2-ynoic acid?
4-Hydroxybut-2-ynoic acid has molecular formula C4H4O3 and molecular weight 100.07300 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Hydroxybut-2-ynoic acid (CAS 7218-52-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1161892-8 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.