Isobutylene oxide
Also known as: 2,2-Dimethyloxirane, 1,2-Epoxy-2-methylpropane, 1,2-Epoxyisobutane, 2-Methylpropylene oxide, 1,1-Dimethyloxirane, Propane, 1,2-epoxy-2-methyl-
Isobutylene oxide (CAS 558-30-5) 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 boiling point of 50-51 °C(lit.), a density of 0.812 g/mL at 25 °C(lit.) and a flash point of 0.6 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H314 — Causes severe skin burns and eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 558-30-5
- Jingsj CID
- J-19466-6
- Molecular Formula
- C4H8O
- Molecular Weight
- 72.10570 g/mol
- Category
- Ethers
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 50-51 °C(lit.) |
|---|---|
| Density | 0.812 g/mL at 25 °C(lit.) |
| Flash Point | 0.6 °C |
| Exact Mass | 72.05750 |
| PSA | 12.53000 |
| LogP | 0.79520 |
| Refractive Index | n20/D 1.374(lit.) |
| Storage Conditions | Flammables area |
| Additional Property | 58 g/L (20 ºC) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H314 — Causes severe skin burns and eye damage
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 29109000 |
|---|
Frequently Asked Questions
What is the CAS number of Isobutylene oxide?
The CAS number of Isobutylene oxide is 558-30-5.
What are the molecular formula and molecular weight of Isobutylene oxide?
Isobutylene oxide has molecular formula C4H8O and molecular weight 72.10570 g/mol.
Is Isobutylene oxide hazardous?
Isobutylene oxide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H314 — Causes severe skin burns and eye damage; H335 — May cause respiratory 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. "Isobutylene oxide (CAS 558-30-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19466-6 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.