3-Butyn-2-ol
Also known as: But-3-yn-2-ol, 1-Butyn-3-ol, 1-Ethynylethanol, 1-Methylpropargyl alcohol, 1-Methyl-2-propynyl alcohol, 3-Hydroxy-1-butyne, Ethynylmethylcarbinol, alpha-Methylpropargyl alcohol, 3-Butyn-2-ol (racemic)
3-Butyn-2-ol (CAS 2028-63-9) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C4H6O and a molecular weight of 70.090 g/mol. Key properties include a melting point of 12ºC, a boiling point of 104.0±0.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 25.6±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2028-63-9
- Jingsj CID
- J-37690-9
- Molecular Formula
- C4H6O
- Molecular Weight
- 70.090 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 12ºC |
|---|---|
| Boiling Point | 104.0±0.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 25.6±0.0 °C |
| Exact Mass | 70.041862 |
| PSA | 20.23000 |
| LogP | -0.03 |
| Vapor Pressure | 17.3±0.3 mmHg at 25°C |
| Refractive Index | 1.435 |
Customs & Trade Information
| HS Code | 2905290000 |
|---|---|
| Summary | 2905290000 unsaturated monohydric alcohols。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Butyn-2-ol?
The CAS number of 3-Butyn-2-ol is 2028-63-9.
What are the molecular formula and molecular weight of 3-Butyn-2-ol?
3-Butyn-2-ol has molecular formula C4H6O and molecular weight 70.090 g/mol.
What are the upstream and downstream products of 3-Butyn-2-ol?
For 3-Butyn-2-ol, Upstream Products: ch3cho, Ethynylmagnesium bromide, Acetylene; Downstream Products: 5-(diethylamino)pent-3-yn-2-ol, (E)-3-Octen-2-ol, 1H-Tridecafluorohexane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Butyn-2-ol (CAS 2028-63-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37690-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.