Propylene oxide <General Name > PO

Product summary

This is a colorless volatile liquid with an ether odor and is ion polymerizable.
It is used in raw materials for propylene glycol, polypropylene glycol, isopropanolamine, allyl alcohol and propylene carbonate, etc.


It is a colorless volatile liquid and has an ether odor.
Volatility is strong so it catches fire extremely easily.

AGC produces propylene oxide (PO) at its Kashima Plant by the chlorohydrin method using chlorine obtained by electrolysis of raw salt.

General name: propylene oxide
Chemical formula: C3H6O

(Reaction) C 3 H 6 + Cl 2 + H 2 O → C 3 H 6 (Cl) (OH) + HCl

                        2C 3 H 6 (Cl)(OH) + Ca(OH) 2 → C 3 H 6 O + CaCl 2 + H 2 O

CSCL Number 2-219
Industrial Safety and Health Act Number 2-219
CAS NO 75-56-9

Main uses

Propylene glycol (raw material for polyester resin, etc.), polypropylene glycol (raw material for urethane foam, etc.), raw material for pigments, intermediary bodies of pharmaceuticals, and disinfectants, etc.


Packing is in lorries or ISO containers.
Please select to match your intended use.

Physical Properties

Propylene Oxide
Appearance Liquid
Color Colorless and transparent liquid
Odor Ether-like
Boiling point34°C
Melting point-104.4°C
Flash point-37 °C(tag closed type)
Relative density0.83g/cm3 (20/20°C)

Warnings for use

Please wear protective gloves, protective glasses, a protective mask and clothing such that your skin will not be directly exposed when handling.
Because volatility is strong and it catches fire extremely easily, please avoid ignition sources such as heat, sparks, naked flame or high temperatures.

Production plant

■ AGC Inc. (Japan) Kashima Plant


*Please refer to the SDS for more detailed product information.