Propylene oxide appears as a clear colorless volatile liquid with an ethereal odor. Flash point -35°F. Boiling point 95°F. Density 6.9 lb./gal. Flammable over a wide range of vapor-air concentrations. If contaminated, may polymerize with evolution of heat and possible rupture of container. Vapors irritate eyes, skin, and respiratory system. Prolonged contact with skin may result in delayed burns. Vapors heavier than air. Used as a fumigant, in making detergents and lubricants, and to make other chemicals.

It is mainly used in the production of polyether polyols, propylene glycol and various non-ionic surfactants.Among them, polyether polyols are important raw materials for the production of polyurethane foams, thermal insulation materials, elastomers, adhesives and coatings.Various non-ionic surfactants are widely used in petroleum, chemical, pesticide, textile, daily chemical and other industries.Meanwhile, propylene oxide is also an important basic chemical feedstock.