Solvent

Isopentyldiol

Reviewed by Rosie · Last updated 18 Aug 2026

Synthetic ingredient that is used as solvent to form cosmetic solutions

At a glance

Hydrating

What Is Isopentyldiol?

Isopentyldiol is a synthetic ingredient that is used as solvent to form cosmetic solutions. It can also add hydration to skin thanks to its humectant properties. Suppliers of this ingredient note it provides emollience minus a tacky feel.\n\nIsopentyldiol is found in all kinds of beauty products, including facial masks, serums, makeup remover wipes, foundations, and hair care.\n\nAs a raw material, it is described as an odorless, colorless, water-soluble liquid.\n\nIn their 2018 assessment, the Cosmetic Ingredient Review Expert Panel surveyed 160 personal care products containing up to 15% isopentyldiol and gave their seal of approval for this ingredient’s safety.

Benefits for Your Skin

Clinical Evidence & References

Published Research

How widely it's used

0.8%
of skincare products contain this ingredient — placing it in the top 25% of most-used ingredients.
Most common in: Treatments Cleansers

Regulatory information

Standardised cosmetic-ingredient identifiers used by regulators.

Show identifiers
INCI Name
ISOPENTYLDIOL
EC Number
256-597-5 / 459-270-7
Function
Solvent

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