Polyglyceryl-2 Stearate
Reviewed by Kate · Last updated 18 Aug 2026
Also known as: Stearic Acid, Diglycerin
Blend of stearic acid and glycerin derivative | Primarily used as an emulsifier
Addresses
EWG Safety Score
What Is Polyglyceryl-2 Stearate?
Polyglyceryl-2 stearate is the ester of humectant diglycerin and the fatty acid stearic acid. It is used in cosmetics for its emulsifying, surfactant, and emollient properties.
The primary use of polyglyceryl-2 stearate in cosmetics is emulsifying. In this role, it negates the need to use greater amounts of heavier-feeling emulsifiers while also improving sensory aesthetics of the product.
This ingredient may be synthetic (the type uses) or animal derived. Use levels of polyglyceryl-2 stearate in cosmetics range from 1–5%, depending on whether it’s the primary or secondary emulsifying agent, sometimes referred to as a co-emulsifier.
Clinical Evidence & References
Published Research
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International Journal of Toxicology, August 2023, pages 5S–101S
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Scientific Reports, March 2023, pages 1–14
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Cosmetic Ingredient Review, Accessed December 2023
From the Clinic
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A synthetic surfactant that cleanses and stabilises formulations
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