Glyceryl Hydroxystearate
AKA “Octadecanoic acid, monoester with 1, 3-propanetriol, Stearic acid, monoester with glycerol, Hydroxyoctadecanoic acid, EINECS 215-355-9”
Synthetic
Ingredient Facts
Glyceryl hydroxystearate
AKA: Octadecanoic acid, Monoester with 1, 3-propanetriol, Stearic acid, Monoester with glycerol, Hydroxyoctadecanoic acid, EINECS 215-355-9
Synthetic · Emollient · EWG: 4
Plant-Derived
Emollient
Cleanser
Emulsifier
Skin Conditioner
Plant Oil
Synthetic
Clean
A plant-derived moisturizer that softens skin and helps blend oil and water in the formula for a smooth texture.
Formula
C21H42O5
Mol. Weight
374.60
CAS #
1323-42-8
Form
Wax
See origin →
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks In Moisture
Traditional Use
Synthetic ester developed as a skin conditioning and emulsifying agent. Created to provide both hydrophobic and hydrophilic properties in cosmetic formulations.
Skin Types
●all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Amended Final Report on the Safety Assessment of Hydroxystearic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Isostearic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Oleic Acid, Lauric Acid, Palmitic Acid, Myristic Acid, and Stearic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report: Safety Assessment of Polyhydroxystearic Acid, Poly(3-Hydroxyoctanoic Acid, and Polylactic Acid as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Re-evaluation: Safety Assessment of Hydroxystearic Acid as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR