Sorbitan Isostearate
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: Isostearic Acid, Sorbitol
Similar to the liquid fatty acid isostearic acid | Works as a mild cleansing agent and emulsifier
Addresses
EWG Safety Score
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What Is Sorbitan Isostearate?
Sorbitan isostearate is a mild cleansing agent and emulsifier made by combining portions of fatty acid isostearic acid with the sugar ingredient sorbitol. It may be derived from plants, made synthetically, or animal-derived, although the latter form has fallen out of favor ( uses the plant-derived form).
Amounts as low as 2% can be used to stabilize emulsions, and its safety has been established in concentrations up to 25%, although sorbitan isostearate is rarely used above 10% concentration in skin care formulas.
Clinical Evidence & References
Published Research
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International Journal of Toxicology, September 2019, pages 60S-80S [https://pubmed.ncbi.nlm.nih.gov/31522651/]
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Chromatographia, May 2009, pages 157-164 [https://link.springer.com/article/10.1365/s10337-009-1134-8]
Frequently Asked Questions
From the Clinic
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Sorbeth-30 Tetraoleate
A synthetic emulsifier that helps oil and water phases blend in skincare formulations
Sorbitan Caprylate
A plant-derived emulsifier with emerging purifying properties
Sorbitan Fatty Acid Ester
A surfactant derived from sorbitol and fatty acids that stabilises oil and water in formulations
Sorbitan Laurate
Works as a cleansing agent and emulsifier | Also used to enhance the overall texture of skin care products
Sorbitan Oleate
Emulsifier and cleansing agent | Also used in food preparations
Sorbitan Oleate Decylglucoside Crosspolymer
A synthetic emulsifier and cleanser that stabilises formulations and reduces foam
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