Ingredient review
PEG-2 Stearate SE
INCI: PEG-2 Stearate SE
A reliable emulsifier that helps create stable, creamy textures, but may be slightly pore-clogging for some skin types.
In plain English
PEG-2 Stearate SE is a helper ingredient that acts like a bridge between oil and water. Without it, many creams and lotions would separate into oily and watery layers. The 'SE' stands for 'self-emulsifying,' meaning it can form a stable emulsion on its own without needing extra emulsifiers. It's made by combining stearic acid (a fatty acid from plant or animal sources) with ethylene oxide, creating a mild, waxy compound.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is low; clogging risk is moderate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
PEG-2 Stearate SE can be useful, but watch for possible clogging concerns.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging PEG-2 Stearate SE.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic emulsifier derived from stearic acid and ethylene oxide. It is waxy in texture and helps oil and water mix together in skincare products.
How it works
When mixed with water, PEG-2 Stearate SE forms tiny droplets that surround oil particles, keeping them suspended in water. This creates a smooth, uniform cream or lotion that doesn't separate over time. It also helps other ingredients spread evenly on the skin.
Pros
Stable emulsions
Helps creams and lotions stay mixed and smooth, so you get a consistent product every time you use it.
Good texture
Contributes to a rich, creamy feel that spreads easily on the skin without being greasy.
Cons and cautions
Potential pore-clogging
Rates moderate on the comedogenic scale, meaning it could contribute to clogged pores for those prone to breakouts.
Semi-synthetic origin
Made with ethylene oxide processing, which may be a concern for those seeking fully natural or organic products.
Best for
- People who use rich creams or lotions and want a stable, non-separating formula
- Those with normal to dry skin looking for a reliable emulsifier in their moisturizer
Use caution if
- Individuals with very oily or acne-prone skin may want to check for comedogenicity
Usage tips
Safety summary
PEG-2 Stearate SE is considered safe for cosmetic use at typical concentrations. It has low irritation potential but moderate comedogenic risk, so it may not be ideal for acne-prone skin. The ingredient is not associated with significant toxicity or health concerns when used as intended.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have evaluated PEG stearates and found them safe for use in cosmetics. Studies indicate low acute toxicity and minimal skin irritation. Comedogenicity data is limited but suggests moderate potential for pore-clogging in susceptible individuals.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. Generally recognized as safe at typical concentrations.
- Common uses
- Moisturizers, Creams, Lotions, Cleansers
- Environmental note
- PEG compounds can be persistent in the environment, though PEG-2 Stearate SE is used in small amounts and is biodegradable under certain conditions.
Good to know
- The 'SE' in the name means it can work as a standalone emulsifier, simplifying formulation.
- It is often used alongside other emulsifiers to fine-tune texture and stability.
Common questions
What is PEG-2 Stearate SE in beauty products?
PEG-2 Stearate SE is a helper ingredient that acts like a bridge between oil and water. Without it, many creams and lotions would separate into oily and watery layers. The 'SE' stands for 'self-emulsifying,' meaning it can form a stable emulsion on its own without needing extra emulsifiers. It's made by combining stearic acid (a fatty acid from plant or animal sources) with ethylene oxide, creating a mild, waxy compound.
What does PEG-2 Stearate SE do in a beauty product?
When mixed with water, PEG-2 Stearate SE forms tiny droplets that surround oil particles, keeping them suspended in water. This creates a smooth, uniform cream or lotion that doesn't separate over time. It also helps other ingredients spread evenly on the skin.
Is PEG-2 Stearate SE safe for most people?
PEG-2 Stearate SE is considered safe for cosmetic use at typical concentrations. It has low irritation potential but moderate comedogenic risk, so it may not be ideal for acne-prone skin. The ingredient is not associated with significant toxicity or health concerns when used as intended.
Who should be careful with PEG-2 Stearate SE?
Individuals with very oily or acne-prone skin may want to check for comedogenicity
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.