Polyglyceryl-3 Stearate
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: Stearic Acid, Glycerin
Ester of stearic acid and polyglycerin-3 | Functions as an emollient, emulsifier, and surfactant
Addresses
EWG Safety Score
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What Is Polyglyceryl-3 Stearate?
Polyglyceryl-3 stearate is the ester of the fatty acid stearic acid and polyglycerin-3, which is a polymer of glycerin that contains three units. This synthetic ingredient is used in cosmetics to impart an emollient feel that conditions skin, as an emulsifier to keep unlike ingredients (think oil and water) blended, and, in greater amounts as a surfactant. It is considered safe and non-sensitizing as used in cosmetics.
Clinical Evidence & References
Published Research
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www.cir-safety.org/sites/default/files/polyglyceryl%20fatty%20acid.pdf [https://www.cir-safety.org/sites/default/files/polyglyceryl%20fatty%20acid.pdf]
Frequently Asked Questions
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Polyglyceryl-3 Oleate
An emulsifying agent that helps blend oil and water in skincare formulations
Polyglyceryl-3 Polyricinoleate
Primarily used to keep oil and water phases of skin care blended | Helps soften and condition skin
Polyglyceryl-3 Ricinoleate
A plant-derived emulsifier that helps bind water and oil in skincare formulations
Polyglyceryl-4 Caprate
An emollient and surfactant formed by the combination of polyglycerin-4 + capric acid | As a skin-conditioning agent, it smooths and hydrates skin
Polyglyceryl-4 Caprylate
A gentle emollient and emulsifier derived from plant-based sources
Polyglyceryl-4 Cocoate
A coconut-derived emollient and emulsifier that softens and helps stabilise formulations
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