Propylene oxide
Also known as: 1,2-Epoxypropane, Methyloxirane, 2-Methyloxirane, (±)-Methyloxirane, (±)-Propylene oxide, Epoxypropane, Methylethylene oxide
Propylene oxide (CAS 75-56-9) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C3H6O and a molecular weight of 58.079 g/mol. Key properties include a melting point of -112ºC, a boiling point of 32.9±8.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of -37.2±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H224, H302 — Harmful if swallowed and H312 — Harmful in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 75-56-9
- Jingsj CID
- J-25604-7
- Molecular Formula
- C3H6O
- Molecular Weight
- 58.079 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -112ºC |
|---|---|
| Boiling Point | 32.9±8.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | -37.2±0.0 °C |
| Exact Mass | 58.041866 |
| PSA | 12.53000 |
| LogP | 0.13 |
| Additional Property | 2 (vs air) |
| Vapor Pressure | 572.5±0.1 mmHg at 25°C |
| Refractive Index | 1.399 |
| Additional Property | 40 g/100 mL (20 ºC) |
| Additional Property | -112.13℃ |
GHS Safety & Compliance
- H224
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H331 — Toxic if inhaled
- H335 — May cause respiratory irritation
- H340
- H350 — May cause cancer
Customs & Trade Information
| HS Code | 2910200000 |
|---|
Frequently Asked Questions
What is the CAS number of Propylene oxide?
The CAS number of Propylene oxide is 75-56-9.
What are the molecular formula and molecular weight of Propylene oxide?
Propylene oxide has molecular formula C3H6O and molecular weight 58.079 g/mol.
Is Propylene oxide hazardous?
Propylene oxide has GHS signal word Danger and hazard statements H224; H302 — Harmful if swallowed; H312 — Harmful in contact with skin.
What are the upstream and downstream products of Propylene oxide?
For Propylene oxide, Upstream Products: 2-bromo-3,3,3-trifluoropropan-1-ol, Propane Residual Solvent Standard, Methanol; Downstream Products: 1-Mercapto-2-propanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Propylene oxide (CAS 75-56-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-25604-7 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.