What it is
Dimethyl ether is a simple, low-boiling ether that exists as a gas at room temperature and is stored under pressure as a liquid in aerosol cans. It propels the product out of the container and also acts as a solvent that helps the formula spray finely and dry quickly. In spray sunscreens it contributes to a light, fast-drying mist.
Safety & warnings
As a propellant, dimethyl ether is flammable, so aerosol products containing it should be kept away from heat, flame, and sparks and not applied near open flame. Spray products should not be inhaled and should be kept away from the eyes; spraying in well-ventilated areas is advised.
Origin & sourcing
It is produced synthetically, commonly from methanol dehydration.
Questions everyone asks
What is dimethyl ether's role in a spray sunscreen?
It serves as a propellant and solvent, pushing the product out of the can as a fine, fast-drying mist.
Is it flammable?
Yes. It is a flammable propellant, so aerosols containing it should be kept away from heat and flame and never sprayed near fire.