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C18-38 Alkyl Hydroxystearoyl Stearate

What C18-38 Alkyl Hydroxystearoyl Stearate is & what it does

C18-38 Alkyl Hydroxystearoyl Stearate is a synthetic wax ester made from long-chain fatty alcohols and hydroxystearic acid. In skincare and sunscreen formulas it works as a thickener and emollient, adding body to the texture and helping to form a smooth, occlusive film on the skin. Its waxy nature makes it useful for stabilizing the consistency of creams and sticks.

Is C18-38 Alkyl Hydroxystearoyl Stearate safe?

C18-38 Alkyl Hydroxystearoyl Stearate is a wax ester used as a thickener and emollient, and such fatty esters are generally well tolerated in cosmetics. It is used to build texture rather than as a reactive active. A patch test is sensible if you have a history of sensitivity.

Does C18-38 Alkyl Hydroxystearoyl Stearate clog pores?

Comedogenicity depends on the full formula and on individual skin, so it is hard to make a blanket statement. As a heavy wax ester it can contribute to a richer, more occlusive texture, which some acne-prone users prefer to avoid in high amounts. If you are concerned, monitor how your skin responds or seek professional advice.

Is C18-38 Alkyl Hydroxystearoyl Stearate natural or synthetic?

It is a synthetic wax ester produced from long-chain fatty alcohols and hydroxystearic acid. The starting materials can be plant-derived, but the ester itself is made through chemical processing. Sourcing varies by supplier.

Sunscreens with C18-38 Alkyl Hydroxystearoyl Stearate

We rate 10 sunscreens that contain it:

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