Ingredient review
Ceteth-13
INCI: CETETH-13
Ceteth-13 is a gentle synthetic emulsifier that helps mix water and oil in creams and cleansers, with a low risk of irritation.
In plain English
Ceteth-13 is a man-made ingredient that helps water and oil stay blended together in products like lotions and face washes. Without emulsifiers like this, your moisturizer would separate into watery and oily layers. It is considered very mild and unlikely to cause breakouts or stinging, making it a common choice for sensitive skin formulas.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ceteth-13 is generally a lower-concern ingredient when the full formula suits your skin.
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 Ceteth-13.
- 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
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Ceteth-13 is a polyethylene glycol (PEG) ether of cetyl alcohol, produced synthetically. It belongs to a family of emulsifiers that reduce surface tension between oil and water, allowing them to mix into a stable cream or lotion.
How it works
In a cosmetic product, Ceteth-13 molecules have one end that attracts water and another that attracts oil. When you shake or stir the product, these molecules surround tiny oil droplets and suspend them in water, creating a smooth, uniform texture that doesn't separate over time.
Pros
Gentle on skin
Ceteth-13 has a very low irritation score, making it a safe choice for sensitive skin types and daily use.
Effective stabilizer
It reliably prevents oil and water from separating, so your product stays smooth and effective from first use to last.
Cons and cautions
Synthetic origin
As a PEG-derived compound, it is not natural or biodegradable, which may be a concern for environmentally conscious consumers.
Potential trace impurities
During manufacturing, PEGs can contain trace amounts of ethylene oxide or 1,4-dioxane, though reputable brands purify their ingredients to safe levels.
Best for
- Anyone using lotions, creams, or cleansers who wants a stable, non-irritating formula
- People with sensitive or reactive skin looking for mild emulsifiers
Use caution if
- Those who strictly avoid all synthetic or PEG-based ingredients for personal or environmental reasons
Usage tips
Safety summary
Ceteth-13 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. The main safety concern is possible trace contamination with 1,4-dioxane during manufacturing, but reputable suppliers purify the ingredient to meet safety standards.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have found PEG ethers like Ceteth-13 to be safe in cosmetics when formulated properly. No significant human or animal studies indicate toxicity at use levels.
Common label clues
- Typical concentration
- Typically 0.5% to 5% of a formula
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The EU CosIng database lists it as a safe surfactant and emulsifier at typical use levels.
- Common uses
- Cleansers, Moisturizers, Lotions, Creams
- Environmental note
- Ceteth-13 is synthetic and not readily biodegradable. Its production involves fossil fuel-derived ethylene oxide, which has a moderate environmental footprint.
Good to know
- Ceteth-13 is often used alongside other emulsifiers to create a more stable emulsion.
- The number '13' refers to the average length of the PEG chain, which affects how water-loving the molecule is.
Common questions
What is Ceteth-13 in beauty products?
Ceteth-13 is a man-made ingredient that helps water and oil stay blended together in products like lotions and face washes. Without emulsifiers like this, your moisturizer would separate into watery and oily layers. It is considered very mild and unlikely to cause breakouts or stinging, making it a common choice for sensitive skin formulas.
What does Ceteth-13 do in a beauty product?
In a cosmetic product, Ceteth-13 molecules have one end that attracts water and another that attracts oil. When you shake or stir the product, these molecules surround tiny oil droplets and suspend them in water, creating a smooth, uniform texture that doesn't separate over time.
Is Ceteth-13 safe for most people?
Ceteth-13 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. The main safety concern is possible trace contamination with 1,4-dioxane during manufacturing, but reputable suppliers purify the ingredient to meet safety standards.
Who should be careful with Ceteth-13?
Those who strictly avoid all synthetic or PEG-based ingredients for personal or environmental reasons
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.