PEG-75 Stearate
INCI: PEG-75 STEARATE
Reviewed by Rosie · Last updated 14 Aug 2026
Also known as: Peg-75 Stearate
A surfactant that helps stabilise and blend formulations, commonly used in sunscreens and cleansers
Best For Skin Types
All
Usage Frequency
Daily
What Is PEG-75 Stearate?
PEG-75 Stearate is a synthetic surfactant created by combining polyethylene glycol with stearic acid. It belongs to the broader family of PEG compounds, which are widely used in cosmetic manufacturing.
In skincare formulations, PEG-75 Stearate primarily functions as an emulsifier and solubilising agent. This means it helps blend ingredients that wouldn't normally mix together, such as oils and water-based components. It also aids in maintaining the stability and consistency of products, particularly in sunscreens and cleansing formulations.
How It Works
PEG-75 Stearate works by positioning itself at the boundary between oil and water phases in a formulation. One end of its molecular structure is attracted to oils, whilst the other is attracted to water. This allows it to act as a bridge, holding these incompatible ingredients together in a stable emulsion.
In sunscreen formulations specifically, it also influences how the product spreads and sets on the skin, contributing to the film-forming properties that help maintain consistent UV protection.
Clinical Evidence & References
Research indicates that PEG-derived surfactants, including those in this family, are generally well-tolerated in cosmetic formulations at typical usage levels. Safety assessments have evaluated related PEG compounds and found them suitable for use in skincare and sun protection products.
However, PEG-75 Stearate itself is used in only a small proportion of skincare products, so targeted clinical data specific to this individual ingredient is limited. Its safety profile is supported by the broader evidence base for PEG surfactants rather than by extensive standalone studies.
Published Research
How to Use
PEG-75 Stearate is an ingredient added by manufacturers during formulation; it is not something you apply directly or adjust yourself. When using products containing this ingredient, apply them as directed by the product instructions. It has no special application requirements and functions invisibly within the formula.
Safety & Precautions
Frequently Asked Questions
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PEG-75 Stearate is a variant of PEG-100 Stearate, the form you will most often see on an ingredients list.
Multitasking ingredient that can be used as an emulsifier/cleansing agent in cosmetic formulas | May also be utilized to deliver a soft, moisturised feel to skin, thanks to its emollient properties
Related Ingredients
PEG-100 Stearate
Multitasking ingredient that can be used as an emulsifier/cleansing agent in cosmetic formulas | May also be utilized to deliver a soft, moisturised feel to skin, thanks to its emollient properties
PEG-40 Stearate
Typically functions as a cleansing agent in skin care formulas | Can also be used as a thickener/texture enhancer or to help keep ingredients soluble
PEG-30 Stearate
Made from polyethylene glycol and stearic acid | Has cleansing, emulsifying, suspending, and solubolizing properties
PEG-8 Stearate
A surfactant and emulsifier that helps blend oil and water-based ingredients
PEG-20 Stearate
A synthetic emulsifier that helps bind water and oil in skincare formulations
PEG-120 Methyl Glucose Trioleate
A multifunctional cleansing agent and emollient derived from glucose and plant oils
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