Glyceryl Triacetyl Hydroxystearate

What is Glyceryl Triacetyl Hydroxystearate?

Glyceryl Triacetyl Hydroxystearate is a synthetic ester formed by reacting glycerin with acetylated 12-hydroxystearic acid, a modified fatty acid typically sourced from vegetable oils like castor oil. This waxy, lipophilic ingredient belongs to the class of acetylated glycerides and is commonly used in cosmetics, especially anhydrous products such as lipsticks, mascaras, and solid emollients. It functions by mimicking natural skin lipids to provide a smooth, protective layer on the skin's surface, while also dissolving pigments and oils for uniform dispersion. In formulations, it controls thickness to prevent separation, improves spreadability for easy application, and aids in binding components together, resulting in creamy, non-greasy textures that feel luxurious.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Provides a softening effect that smooths skin texture for a supple feel.

Enhances product spreadability and stability for better application.

Supports even distribution of other ingredients like colors and oils.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with dry or rough skin desiring gentle softening agents.
People with known allergies to fatty acid esters or glycerides.
Users of makeup products seeking smooth, long-wearing formulas.
Individuals sensitive to castor-derived ingredients.
Those preferring non-comedogenic options in oil-based cosmetics.
Those preferring fully botanical or unmodified emollients.

Safety Notes

  • Rated low hazard by environmental health databases.
  • Non-comedogenic, unlikely to block pores.

Frequently Asked Questions about Glyceryl Triacetyl Hydroxystearate

What is Glyceryl Triacetyl Hydroxystearate derived from?

It is a synthetic ester from glycerin and acetylated hydroxy stearic acid, often plant-based.

Is it suitable for sensitive skin?

It shows low irritation potential according to safety assessments.

Where is it commonly used?

Primarily in lipsticks, mascaras, and other solid cosmetic products.