Steareth-100/PEG-136/Hdi Copolymer

What is Steareth-100/PEG-136/Hdi Copolymer?

Steareth-100/PEG-136/HDI Copolymer is a synthetic polymer created by reacting steareth-100—a polyethoxylated derivative of stearyl alcohol with 100 ethylene oxide units—polyethylene glycol 136 (PEG-136), and hexamethylene diisocyanate (HDI). This forms a polyurethane-PEG copolymer commonly used in makeup and hair care products. It functions primarily by increasing viscosity, which helps suspend particles, stabilize emulsions, and create desirable textures for smooth application and even distribution. In formulations like mascaras or creams, it forms thin, flexible films that enhance product performance without stiffness. Derived entirely from petrochemical sources, it undergoes processing to meet cosmetic purity standards, enabling its role in diverse personal care items where consistent flow and hold are essential.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-6 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Enhances product thickness for better stability and particle suspension.

Improves texture for smoother dispensing and application.

Supports formulation usability across creams, lotions, and makeup.

Who It's For

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

Who May Benefit Who Should Avoid
People using viscous products like moisturizers or mascaras for improved handling.
Those sensitive to polyethylene glycol derivatives.
Individuals seeking stable emulsions that resist separation.
People with allergies to isocyanate-based compounds.
Users preferring products with controlled flow for precise application.
Individuals preferring natural or PEG-free formulations.

Safety Notes

  • Rated low comedogenic potential, suitable for acne-prone skin.
  • Assessed with varying safety scores based on purity and use levels.

Frequently Asked Questions about Steareth-100/PEG-136/Hdi Copolymer

What does this ingredient do in skincare?

It adjusts thickness, stabilizes formulas, and improves texture for better usability.

Is it safe for sensitive skin?

Generally low irritation risk, but patch test if sensitive to PEGs.

Where is it commonly found?

In makeup like mascaras, creams, and lotions for viscosity control.