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Isopentyldiol

What Isopentyldiol is & what it does

Isopentyldiol is a small synthetic diol, a branched alcohol with two hydroxyl groups. In skincare and sunscreen formulas it works as a humectant and solvent, helping to hold moisture and to dissolve other ingredients. It is also valued for improving the sensory feel of a product and supporting overall texture.

Is Isopentyldiol safe?

Isopentyldiol is a small diol used as a humectant and solvent in cosmetics and is generally considered suitable for topical use at formula levels. It is a well-established multifunctional ingredient. Sensitivity is uncommon, but a patch test is sensible if your skin reacts easily.

What does Isopentyldiol do in skincare?

Isopentyldiol acts as a humectant and solvent. It helps hold moisture, helps dissolve other ingredients, and can improve a product's texture and sensory feel. In a formula it supports both hydration and overall stability rather than acting as a sunscreen active.

Is Isopentyldiol natural or synthetic?

Isopentyldiol is synthetic. It is a man-made branched diol rather than something extracted from a plant or animal. Synthetic diols like this are chosen for their consistent performance as humectants and solvents.

Sunscreens with Isopentyldiol

We rate 25 sunscreens that contain it, showing the top 10 by overall score:

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