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1,5-Pentanediol

What 1,5-Pentanediol is & what it does

1,5-Pentanediol is a synthetic diol, a small water-soluble alcohol with two hydroxyl groups. In skincare it functions as a humectant and solvent that helps attract water and dissolve other ingredients, and it can also contribute to a formula's preservation system by boosting the activity of preservatives. It is valued for being a multifunctional, lightweight ingredient.

Is 1,5-Pentanediol safe?

1,5-Pentanediol is a small diol widely used in skincare as a humectant and solvent and is generally considered safe at typical use levels. It is usually well tolerated, though very sensitive skin may occasionally react to any glycol-type ingredient. Patch testing a new product is sensible if your skin is reactive.

What does 1,5-Pentanediol do in skincare?

1,5-Pentanediol is a multifunctional ingredient that acts as a humectant and solvent. It helps attract and hold water, dissolve other ingredients, and can boost the effectiveness of a formula's preservative system. It is valued for being lightweight and versatile.

Is 1,5-Pentanediol natural or synthetic?

1,5-Pentanediol is typically synthetic, produced through industrial chemical processes. Some grades can be made from plant-derived raw materials, but the ingredient itself is a manufactured compound. Check with a brand if a bio-based origin matters to you.

Sunscreens with 1,5-Pentanediol

We rate 9 sunscreens that contain it:

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