Stearyl Stearate

What is Stearyl Stearate?

Stearyl stearate is a fatty acid ester formed from stearic acid and stearyl alcohol, typically derived from plant-based sources like vegetable oils or fats. Chemically, it appears as a white, waxy solid that melts at skin temperature. In cosmetics, it belongs to the emollient and conditioning agent category, commonly found in creams, lotions, lip products, and foundations. It functions by creating a lightweight barrier on the skin's surface to lock in moisture, while also thickening formulations for better spreadability and stability. This dual action helps products apply smoothly without greasiness, improving overall sensory experience. Its inert nature makes it suitable for a wide range of skin types in everyday personal care items.

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:

Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
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.

Benefits

Softens and smooths skin by mimicking natural lipids to enhance flexibility.

Thickens formulations for improved texture, spreadability, and product stability.

Provides light emolliency to support skin's moisture barrier without heaviness.

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 seeking gentle softening effects.
People with known allergies to fatty acid esters.
Users of creams and lotions desiring smoother application and texture.
Those sensitive to emollient textures in heavy formulations.
Those preferring lightweight ingredients that aid moisture retention.
Individuals preferring completely anhydrous product types.

Safety Notes

  • Rated low hazard by safety assessments, suitable for general use.
  • Non-comedogenic profile supports inclusion in acne-prone routines.

Frequently Asked Questions about Stearyl Stearate

What is stearyl stearate derived from?

It is an ester from stearic acid and stearyl alcohol, often sourced from vegetable fats.

Is stearyl stearate safe for sensitive skin?

Safety evaluations indicate low irritation potential for most users.

How does it function in skincare products?

It conditions skin, adjusts viscosity, and provides emollient effects for better texture.