Ingredient dictionary

Butane

Also listed as: n-Butane

Butane is a light hydrocarbon gas that is squeezed into liquid form and used as a propellant to push product out of an aerosol can. It is on the label of 40 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Butane does

Pushes product out of the can
Creates a fine, even spray
Evaporates quickly after spraying

Butane is a hydrocarbon, a small molecule made of carbon and hydrogen. It is gathered from natural gas processing and oil refining. At room temperature it is a gas, but it turns into a liquid under modest pressure, which is how it is packed into aerosol cans. Formulators use it as a propellant because it is widely available and blends well with other propellants.

When you press the valve, the pressure drops and the butane pushes the product out as a fine mist. The mist dries quickly because butane evaporates fast, leaving the rest of the formula behind. Because it is flammable, aerosol cans should be kept away from heat and flames, and never punctured or thrown into a fire.

Good for

Suits people who like a light, fast-drying aerosol spray in dry shampoos and deodorants.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is butane safe in dry shampoo?

Butane is widely used in aerosol cosmetics and is generally well tolerated on skin. The main safety point is the can: it is flammable, so keep it away from heat and open flames. Spray in a ventilated area and avoid spraying near open flames.

Does butane dry out the skin?

Butane evaporates quickly, so the spray can feel cool for a moment as it leaves the skin. It does not add moisture or stay behind. Aerosol products that dry fast can feel drying to some people, so a light hand and a moisturizer afterward may feel more comfortable.