Glyceryl Hydroxystearate

What is Glyceryl Hydroxystearate?

Glyceryl hydroxystearate is a fatty acid ester produced by combining glycerol with 12-hydroxystearic acid, typically sourced from hydrogenated castor oil derived from the seeds of Ricinus communis. This ingredient falls into the category of nonionic emulsifiers and emollients used in oil-in-water cosmetic formulations like moisturizers, lotions, and hair conditioners. It works by forming a stable interfacial film between oil and water phases, preventing separation and creating smooth, creamy textures. The hydroxy group on the stearic chain enhances its ability to organize into liquid crystalline structures, which mimic skin's natural lipid layers, aiding in better product spreadability and a non-greasy feel. In cleansing products, it contributes mild surfactant properties for gentle foaming and rinsing without stripping the skin barrier.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-3 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.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Benefits

Provides softening and smoothing effects on skin surface for improved texture.

Stabilizes emulsions in creams and lotions for consistent product performance.

Supports mild cleansing in washes while maintaining moisture balance.

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 normal to dry skin seeking hydration in daily moisturizers.
People with rare allergies to castor oil derivatives.
People using emulsion-based products like lotions for better absorption.
Individuals sensitive to ester-based emulsifiers, though uncommon.
Those preferring gentle, non-comedogenic ingredients in routines.
Those preferring completely anhydrous formulations.

Safety Notes

  • Rated low hazard by major cosmetic safety databases.
  • Non-comedogenic with minimal risk of pore clogging.

Frequently Asked Questions about Glyceryl Hydroxystearate

What is glyceryl hydroxystearate?

A glycerol ester from hydrogenated castor oil used as an emollient and emulsifier in skincare.

Is it safe for sensitive skin?

Yes, it shows low irritation potential and is widely used in gentle formulations.

Does it clog pores?

No, with a comedogenic rating of 0, it does not promote acne.