PEG-100 Stearate
Emulsifier and cream stabilizer. Often works together with glyceryl stearate – the pair builds a stable emulsion with a pleasant texture.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Oily, Dry, Combination, Normal
About this ingredient
PEG-100 Stearate is a non-ionic emulsifier, an ester of stearic acid and polyethylene glycol (degree of polymerization 100). One of the most common emulsifiers in cosmetics. Mechanism. Stabilizes oil-in-water emulsions, ensures uniformity and stability of creams, lotions. Facilitates mixing of oil and water phases. Used with glyceryl stearate (the classic "GMS + PEG-100 stearate" pair). Where applied. Creams, lotions, emulsions (1–5%). In most mass-market lines. Evidence base. No clinical RCTs required – a functional emulsifier. CIR confirmed safety. Safety. Hypoallergenic, non-comedogenic. On damaged skin PEG emulsifiers may increase systemic absorption (Lanigan 1999), but this rarely matters clinically. Pregnancy and lactation – topically safe.
Frequently asked questions
Is PEG-100 Stearate safe during pregnancy?
PEG-100 Stearate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is PEG-100 Stearate for?
PEG-100 Stearate suits: oily, dry, combination, normal.
What is PEG-100 Stearate and what does it do in cosmetics?
Emulsifier and cream stabilizer.
What's the INCI name for PEG-100 Stearate?
The INCI name is PEG-100 Stearate.
See PEG-100 Stearate in a product composition right on the store page
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Similar role in the formula
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