cis-2,3-Epoxybutane
Also known as: cis-2,3-dimethyloxirane, (2R,3S)-2,3-dimethyloxirane, (2S,3R)-2,3-dimethyloxirane, cis-2-Butene oxide, cis-2-Butylene oxide, cis-2-Butene epoxide, 2,3-Dimethyl-oxirane (Z), Butane, 2,3-epoxy-, cis-, MFCD00005128
cis-2,3-Epoxybutane (CAS 1758-33-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C4H8O and a molecular weight of 72.10570 g/mol. Key properties include a melting point of -1ºC, a boiling point of 60-61ºC, a density of 0.826 and a flash point of -21.7ºC. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1758-33-4
- Jingsj CID
- J-25546-2
- Molecular Formula
- C4H8O
- Molecular Weight
- 72.10570 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -1ºC |
|---|---|
| Boiling Point | 60-61ºC |
| Density | 0.826 |
| Flash Point | -21.7ºC |
| Exact Mass | 72.05750 |
| PSA | 12.53000 |
| LogP | 0.79360 |
| Vapor Pressure | 239mmHg at 25°C |
| Refractive Index | 1.382-1.384 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of cis-2,3-Epoxybutane?
The CAS number of cis-2,3-Epoxybutane is 1758-33-4.
What are the molecular formula and molecular weight of cis-2,3-Epoxybutane?
cis-2,3-Epoxybutane has molecular formula C4H8O and molecular weight 72.10570 g/mol.
Is cis-2,3-Epoxybutane hazardous?
cis-2,3-Epoxybutane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "cis-2,3-Epoxybutane (CAS 1758-33-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-25546-2 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.