Dipentaerythrityl Tri-Polyhydroxystearate
INCI: Polyhydroxystearic Acid
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: Polyhydroxystearic Acid
Film-forming emollient that is known for adding water-resistance properties (popular in sunscreens)
At a glance
EWG Safety Score
What Is Dipentaerythrityl Tri-Polyhydroxystearate?
Dipentaerythrityl tri-polyhydroxystearate is an emollient that is known for its water-resistance properties due to the film it forms on skin (one of the reasons it is included in certain sunscreen formulations). It can also help enhance the stability of water in oil emulsions and is touted as a pigment dispersant for color formulations. You’ll also find this ingredient in hair care, where it helps minimize frizz and contributes to a smoother comb-through.\n\nChemically speaking, it is the triester of polyhydroxystearic acid combined with a portion of pentaerythritol (a synthetic humectant). This combination helps bind moisture and improves formulary texture.\n\nAs a raw material, it is a yellow-hued liquid. Usage levels range from 0.5–5%, with amounts between 2–3% used in moisturizers and water-resistant sunscreens.
Clinical Evidence & References
Published Research
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Kobo Products, Inc., Accessed January 2022, ePublication Kobo Products, 2022
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PubChem, October 2021, ePublication PubChem, 2021
How widely it's used
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- DIPENTAERYTHRITYL TRI-POLYHYDROXYSTEARATE
- EC Number
- -
- Function
- Emollient, Skin Conditioning
From the Clinic
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A gentle plant-derived emulsifier that helps stabilise skincare formulations
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Emulsifying Wax
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