Ethylene oxide
Also known as: oxirane, 1,2-epoxyethane, dimethylene oxide, ETO, epoxyethane, oxane, oxiraan, oxiran
Ethylene oxide (CAS 75-21-8) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C2H4O and a molecular weight of 44.05260 g/mol. Key properties include a melting point of −111 °C(lit.), a boiling point of 10.7 °C(lit.), a density of 0.882 g/mL at 25 °C(lit.) and a flash point of 低于-17.7ºC. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H302 — Harmful if swallowed and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 75-21-8
- Jingsj CID
- J-1335851-6
- Molecular Formula
- C2H4O
- Molecular Weight
- 44.05260 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −111 °C(lit.) |
|---|---|
| Boiling Point | 10.7 °C(lit.) |
| Density | 0.882 g/mL at 25 °C(lit.) |
| Flash Point | 低于-17.7ºC |
| Exact Mass | 44.02620 |
| PSA | 12.53000 |
| LogP | 0.01660 |
| Refractive Index | n20/D 1.3597(lit.) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H302 — Harmful if swallowed
- H332 — Harmful if inhaled
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H340
- H350 — May cause cancer
Customs & Trade Information
| HS Code | 2910100000 |
|---|
Frequently Asked Questions
What is the CAS number of Ethylene oxide?
The CAS number of Ethylene oxide is 75-21-8.
What are the molecular formula and molecular weight of Ethylene oxide?
Ethylene oxide has molecular formula C2H4O and molecular weight 44.05260 g/mol.
Is Ethylene oxide hazardous?
Ethylene oxide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H302 — Harmful if swallowed; H332 — Harmful if inhaled.
What are the upstream and downstream products of Ethylene oxide?
For Ethylene oxide, Upstream Products: 1,2-dichloroethane, ethane, Chloroethane; Downstream Products: Ethylene glycol dinitrate, Diethylene glycol dinitrate, 2-([1,1'-biphenyl]-4-yl)ethanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Ethylene oxide (CAS 75-21-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1335851-6 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.