Aluminum Starch Octenylsuccinate
Reviewed by Emma · Last updated 14 Aug 2026
Synthetic powdery thickening agent
EWG Safety Score
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What Is Aluminum Starch Octenylsuccinate?
A synthetic powdery thickening agent, absorbent, and anti-caking agent used in cosmetics. When listed among the first few ingredients in a product, chances are the product will have a powder-like matte finish and fast dry time.
Benefits for Your Skin
Clinical Evidence & References
Published Research
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Toxicology and Applied Pharmacology, March 2018, Volume 342, pages 14-21 Toxicology and Applied Pharmacology, 2018
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Colloids and Surfaces B: Biointerfaces, November 2015, Volume 135, pages 183-192 Colloids and Surfaces B: Biointerfaces, 2015
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International Journal of Pharmacy and Pharmaceutical Sciences, January 2013, Volume 5, Issue 1, pages 306-309 International Journal of Pharmacy and Pharmaceutical Sciences, 2013
From the Clinic
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Adipic Acid/Neopentyl Glycol Crosspolymer
A film-forming polymer that regulates texture and absorption in powder and liquid formulations
Agar
A polysaccharide derived from seaweed that stabilises and thickens skincare formulations
Alginic Acid
A seaweed-derived polysaccharide that stabilises formulations and conditions skin
Aluminum Stearate
Aluminum stearate is an aluminum salt of stearic acid that functions as a thickening agent and helps stabilise products.
Aluminum/Magnesium Hydroxide Stearate
A stabilising compound that strengthens skin barrier function and protects against irritants
Ammonium Acryloyldimethyltaurate/Carboxyethyl Acrylate Crosspolymer
A film-forming polymer that stabilises texture and consistency in skincare formulations
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