2-Hydroxy-3-butynoic acid
2-羟基-3-丁炔酸
Also known as: 2-Hydroxybut-3-ynoic acid, 2-HYDROXY-3-BUTYNOIC ACID, Hydroxybutynoic acid, 3-Butynoic acid, 2-hydroxy-
2-Hydroxy-3-butynoic acid (CAS 38628-65-8) 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 100.073 g/mol. It is also known as 2-Hydroxybut-3-ynoic acid, 2-HYDROXY-3-BUTYNOIC ACID and Hydroxybutynoic acid. Key properties include a boiling point of 279.7±25.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 137.2±19.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 38628-65-8
- Jingsj CID
- J-28232-7
- Molecular Formula
- C4H4O3
- Chinese Name
- 2-羟基-3-丁炔酸
- Molecular Weight
- 100.073 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 279.7±25.0 °C at 760 mmHg |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 137.2±19.7 °C |
| Exact Mass | 100.016045 |
| PSA | 57.53000 |
| LogP | -0.22 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.518 |
Customs & Trade Information
| HS Code | 2918199090 |
|---|---|
| Summary | 2918199090 other carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Hydroxy-3-butynoic acid?
The CAS number of 2-Hydroxy-3-butynoic acid is 38628-65-8.
What are the molecular formula and molecular weight of 2-Hydroxy-3-butynoic acid?
2-Hydroxy-3-butynoic acid has molecular formula C4H4O3 and molecular weight 100.073 g/mol.
What are the upstream and downstream products of 2-Hydroxy-3-butynoic acid?
For 2-Hydroxy-3-butynoic acid, Upstream Products: Propiolaldehyde, Water.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Hydroxy-3-butynoic acid (CAS 38628-65-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28232-7 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.