CAS Number: 75‑56‑9
Synonyms: Propylene oxide; 1,2‑epoxypropane; Methyloxirane; 2‑Methyloxirane
Chemical Formula: C₃H₆O
Molecular Weight: 58.08 g/mol
Product Introduction
A colorless, volatile, ethereal-odored liquid used industrially to produce propylene glycol, polyether polyols, glycerol, and as a solvent and reagent in organic synthesis. USP-grade available as reference standard.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odor | Benzene-like, sweet, ethereal |
| Density @ 25 °C | ~0.83 g/cm³ |
| Melting Point | −112 °C |
| Boiling Point | ~34–35 °C |
| Flash Point | −37 °C |
| Vapor Pressure @20 °C | ~445 mm Hg |
| Solubility in Water | ~40–41 % |
| Vapor Density | ~2 × air |
| Explosion Limits | ~2.3–36% |
Extremely flammable, pressurized, and explosive. Toxic, mutagenic, respiratory irritant; IARC 2B carcinogen. TLV‑TWA ~20 ppm. GHS H224/H302/H311/H319/H335/H340/H350. Handle with PPE under inert conditions, store cool sealed away from ignition and organic materials.