Stearoxydimethicone

What is Stearoxydimethicone?

Stearoxydimethicone is a synthetic silicone polymer created by modifying dimethicone with a stearoxy group, resulting in a lightweight, hydrophobic compound. It belongs to the category of silicone-based ingredients widely used in skincare, haircare, and makeup products. Functionally, it acts as an emollient by depositing a thin, flexible film on the skin's surface, which fills in minor imperfections, promotes even application, and minimizes transepidermal water loss. This film also boosts slip and spreadability, giving formulations a luxurious, silky feel. In emulsions like lotions and creams, it stabilizes the product while providing conditioning effects that maintain skin's suppleness. Its chemical stability makes it suitable for various pH levels and compatible with active ingredients, enhancing overall sensory performance without heaviness.

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

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.

Benefits

Provides a smooth, silky texture to skin by filling surface irregularities.

Supports skin hydration by forming a protective barrier that limits moisture evaporation.

Enhances product application with improved slip and non-sticky finish.

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 softness and smoothness.
People with known silicone sensitivities, though rare.
Users preferring lightweight formulas that absorb quickly.
Individuals preferring silicone-free products for personal reasons.
Those applying products needing better spreadability and even coverage.
Anyone experiencing unusual reactions; patch testing recommended.

Safety Notes

  • Considered low hazard with scores of 1 across EWG database ratings.
  • Recognized as safe for cosmetic use in reviews by ingredient safety panels.

Frequently Asked Questions about Stearoxydimethicone

What is stearoxydimethicone used for in cosmetics?

It serves as an emollient and skin conditioner, softening skin and improving product texture.

Is stearoxydimethicone safe for sensitive skin?

It has low irritation potential and low hazard ratings, generally well-tolerated.

Does it cause acne?

With a comedogenic rating of 0, it does not promote pore clogging.