2-Metbut-1-en-1yne
Also known as: 1-Butene-3-yne, 2-methyl-, 2-METHYL-1-BUTEN-3-YNE, 2-Methyl-1-buten-3-yne, 2-Methyl-1-butenyne, 2-Methylbutenyne, 2-methyl-1-buten-3-yn, 2-methylbut-1-en-3-yne, 3-Methyl-3-buten-1-yne, CH2=C(CH3)CequivCH, EINECS 201-144-9, MFCD00008599, Valylene
2-Metbut-1-en-1yne (CAS 78-80-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H6 and a molecular weight of 66.10110 g/mol. Key properties include a melting point of -113 °C, a boiling point of 32 °C(lit.), a density of 0.695 g/mL at 25 °C(lit.) and a flash point of -6.7 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 78-80-8
- Jingsj CID
- J-30217-0
- Molecular Formula
- C5H6
- Molecular Weight
- 66.10110 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -113 °C |
|---|---|
| Boiling Point | 32 °C(lit.) |
| Density | 0.695 g/mL at 25 °C(lit.) |
| Flash Point | -6.7 °C |
| Exact Mass | 66.04700 |
| LogP | 1.19570 |
| Vapor Pressure | 8.96 psi ( 20 °C) |
| Refractive Index | n20/D 1.416(lit.) |
Frequently Asked Questions
What is the CAS number of 2-Metbut-1-en-1yne?
The CAS number of 2-Metbut-1-en-1yne is 78-80-8.
What are the molecular formula and molecular weight of 2-Metbut-1-en-1yne?
2-Metbut-1-en-1yne has molecular formula C5H6 and molecular weight 66.10110 g/mol.
What are the upstream and downstream products of 2-Metbut-1-en-1yne?
For 2-Metbut-1-en-1yne, Upstream Products: 2-Methyl-3-butyn-2-ol, 3-Chloro-3-methyl-1-butyne, Ethanol; Downstream Products: 3-Chloro-3-methyl-1-butyne, 2-Methyl-4-trimethylsilyl-1-buten-3-yne, 3-Methylbut-1-ene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Metbut-1-en-1yne (CAS 78-80-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30217-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.