Methyl 4-hydroxy-2-butynoate
Also known as: 2-Butynoic acid, 4-hydroxy-, methyl ester, Methyl 4-hydroxybut-2-ynoate, Methyl-4-hydroxy-2-butynoate, 4-Hydroxy-2-pentynoate, 4-hydroxybut-2-ynoic acid methyl ester, Nsc292683, hydroxymethylpropargylic methyl ester, methyl 3-hydroxy-2-butynoate, methyl 4-hydroxy-2-but-2-ynoate
Methyl 4-hydroxy-2-butynoate (CAS 31555-05-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H6O3 and a molecular weight of 114.099 g/mol. Key properties include a boiling point of 219.9±23.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 95.7±16.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 31555-05-2
- Jingsj CID
- J-1180349-9
- Molecular Formula
- C5H6O3
- Molecular Weight
- 114.099 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 219.9±23.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 95.7±16.1 °C |
| Exact Mass | 114.031693 |
| PSA | 46.53000 |
| LogP | 0.64 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.468 |
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 Methyl 4-hydroxy-2-butynoate?
The CAS number of Methyl 4-hydroxy-2-butynoate is 31555-05-2.
What are the molecular formula and molecular weight of Methyl 4-hydroxy-2-butynoate?
Methyl 4-hydroxy-2-butynoate has molecular formula C5H6O3 and molecular weight 114.099 g/mol.
What are the upstream and downstream products of Methyl 4-hydroxy-2-butynoate?
For Methyl 4-hydroxy-2-butynoate, Upstream Products: Methanol, 2-(propargyloxy)tetrahydropyran, Diazomethane; Downstream Products: Phthalide, 3-Bromo-2(5H)-furanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl 4-hydroxy-2-butynoate (CAS 31555-05-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1180349-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.