1-buten-3-yne
Also known as: 1-BUTEN-3-YNE, 1-Butenyne, 3-Buten-1-yne, 3-butene-1-yne, Butenyne, EINECS 211-713-3, Ethene,ethynyl, but-1-en-3-yne, but-3-en-1-yne, butenyne, monovinyl acetylene, vinyl-acetylene
1-buten-3-yne (CAS 689-97-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H4 and a molecular weight of 52.07460 g/mol. Key properties include a melting point of -118ºC, a boiling point of 5ºC and a density of 0.71. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 689-97-4
- Jingsj CID
- J-9729-0
- Molecular Formula
- C4H4
- Molecular Weight
- 52.07460 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -118ºC |
|---|---|
| Boiling Point | 5ºC |
| Density | 0.71 |
| Exact Mass | 52.03130 |
| LogP | 0.80560 |
| Refractive Index | 1.408 |
Frequently Asked Questions
What is the CAS number of 1-buten-3-yne?
The CAS number of 1-buten-3-yne is 689-97-4.
What are the molecular formula and molecular weight of 1-buten-3-yne?
1-buten-3-yne has molecular formula C4H4 and molecular weight 52.07460 g/mol.
What are the upstream and downstream products of 1-buten-3-yne?
For 1-buten-3-yne, Upstream Products: 1,4-Dichloro-2-butene, Acetylene, trans-1,4-Dichloro-2-butene; Downstream Products: 4-Isopropoxy-2-butanone, chloroprene, 1,3-dichloro-2-butene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-buten-3-yne (CAS 689-97-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9729-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.