Ingredient dictionary

C15-19 Alkane

A blend of straight and branched hydrocarbon molecules, each with 15 to 19 carbon atoms, used mainly to soften and smooth skin. It is on the label of 10 products in our library. Checked against our library November 6, 2026.

What C15-19 Alkane does

Softens and smooths the skin surface
Helps lotions spread without dragging
Helps slow water loss from the skin

C15-19 Alkane is a blend of hydrocarbons, which are molecules made only of carbon and hydrogen. Its chains are straight or branched and hold between 15 and 19 carbon atoms each. Most of it is refined from petroleum, the same raw material behind many mineral oils. Refining removes unwanted parts, leaving a clean, stable oil.

Formulators use it because it is light and spreads smoothly. It forms a thin film on the skin that softens the surface and helps slow water loss. Because it is not heavy, it suits body lotions that should feel fresh rather than rich. It also helps other oils and waxes blend into a stable, even formula.

Good for

Good for people who want a light, silky lotion feel for everyday body care, including dry skin.

Frequently asked questions

Is C15-19 Alkane the same as mineral oil?

They are related but not identical. Mineral oil is a broad term for refined petroleum oils. C15-19 Alkane is a narrower blend with a set carbon range, so its thickness and feel can differ. Both are petroleum-based hydrocarbons used to soften skin.

Does C15-19 Alkane help dry skin?

It can help. It forms a light film that softens rough skin and slows water loss. It does not add water itself, so pairing it with a moisture-attracting ingredient, like glycerin, can help more.