Rate My SPF

Isobutane

What Isobutane is & what it does

Isobutane is a small hydrocarbon gas used mainly as a propellant in aerosol cosmetic products such as spray sunscreens, mousses, and dry shampoos. It helps expel the product from a pressurized can and contributes to the fine, even mist of aerosol sprays. It is usually blended with related gases like propane and butane to tune the spray pressure.

What does Isobutane do in cosmetics?

Isobutane is commonly used as a propellant in aerosol cosmetic products such as spray sunscreens and mousses. It provides the pressure that pushes the product out of the can and helps create a fine mist. It is usually blended with propane and butane to fine-tune the spray.

Is Isobutane safe in spray sunscreen and cosmetics?

Isobutane is widely used as an aerosol propellant in regulated cosmetic products. As a flammable gas, aerosol cans carry standard warnings to keep them away from heat and flames. Spraying in a ventilated area and avoiding inhalation of the mist are sensible precautions.

Is Isobutane natural or synthetic?

Isobutane is a hydrocarbon gas typically obtained from refining petroleum and natural gas, so it is considered a synthetic or petroleum-derived ingredient. It is purified to a cosmetic grade for use as a propellant. It does not remain on the skin in any meaningful amount.

Sunscreens with Isobutane

We rate 65 sunscreens that contain it, showing the top 10 by overall score:

← All ingredients