3-Methyl-1-butyne
Also known as: 1-Butyne, 3-methyl, 1-Butyne, 3-methyl-, 3-methyl-1-butyne, 3-methylbut-1-yne, EINECS 209-925-6, MFCD00039853
3-Methyl-1-butyne (CAS 598-23-2) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8 and a molecular weight of 68.117 g/mol. Key properties include a melting point of -90ºC, a boiling point of 28.4±8.0 °C at 760 mmHg, a density of 0.7±0.1 g/cm3 and a flash point of -51.1±2.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 598-23-2
- Jingsj CID
- J-48443-5
- Molecular Formula
- C5H8
- Molecular Weight
- 68.117 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -90ºC |
|---|---|
| Boiling Point | 28.4±8.0 °C at 760 mmHg |
| Density | 0.7±0.1 g/cm3 |
| Flash Point | -51.1±2.8 °C |
| Exact Mass | 68.062599 |
| LogP | 1.88 |
| Vapor Pressure | 674.1±0.0 mmHg at 25°C |
| Refractive Index | 1.398 |
Frequently Asked Questions
What is the CAS number of 3-Methyl-1-butyne?
The CAS number of 3-Methyl-1-butyne is 598-23-2.
What are the molecular formula and molecular weight of 3-Methyl-1-butyne?
3-Methyl-1-butyne has molecular formula C5H8 and molecular weight 68.117 g/mol.
What are the upstream and downstream products of 3-Methyl-1-butyne?
For 3-Methyl-1-butyne, Upstream Products: 3-Methyl-2-butanone, Diisopropyl sulfate; Downstream Products: 1,2-dibromo-3-methylbutane, 1-Trimethylsilyl-3,3-dimethyl-1-butyne, 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. "3-Methyl-1-butyne (CAS 598-23-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48443-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.