Isobutane

Isobutane is a low-molecular-weight hydrocarbon gas used in cosmetic aerosols as a propellant and volatile solvent. It dispenses foams and sprays and creates light textures that evaporate quickly after application.
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Ingredient Snapshot

Overview
A gas propellant that helps sprays and foams dispense evenly.
Category
Cleansing
Type
Solvent

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Enables fine mists and airy foams for even coverage; it does not provide direct skincare benefits beyond delivery. Evidence for skin improvements is limited.

Uses In Skincare & Cosmetics

Acts as the propellant in aerosol spray sunscreens, shave foams, setting sprays, dry shampoos, and cleansing mousses.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Highly flammable; keep away from heat, sparks, or open flame and use in well-ventilated areas to minimize inhalation. Can cause transient dryness or irritation on compromised skin. Many regions require flammability warnings on aerosols.

Is Isobutane a Good Ingredient?

Rated Fair because it's useful as a propellant for fine mists and foams but offers no direct skincare benefit of its own, so the rating reflects functional utility only. It's downgraded further by the inhalation and flammability risks that come with aerosol use.

Products with Isobutane

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