Ingredient review
Ceteareth-10 Phosphate
INCI: Ceteareth-10 Phosphate
Ceteareth-10 Phosphate is a gentle emulsifier that helps mix oil and water in products, with low irritation potential and good skin compatibility.
In plain English
Ceteareth-10 Phosphate is a mild cleansing and emulsifying ingredient. It helps oil and water blend together in products like lotions and cleansers, so they stay smooth and don't separate. It's considered gentle on skin and is often used in formulas for sensitive skin.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ceteareth-10 Phosphate 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 Ceteareth-10 Phosphate.
- 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
Ceteareth-10 Phosphate is a semi-synthetic surfactant and emulsifier. It is made by reacting cetearyl alcohol (a fatty alcohol from plant oils) with ethylene oxide and phosphoric acid. This creates a molecule that can attract both water and oil, making it useful for mixing ingredients that normally don't combine.
How it works
In a cosmetic product, Ceteareth-10 Phosphate sits at the boundary between oil and water droplets. Its water-loving head faces the water, while its oil-loving tail faces the oil. This stabilizes the mixture, preventing separation and giving the product a uniform texture. It also helps cleanse by lifting dirt and oil from the skin so they can be rinsed away.
Pros
Gentle on skin
Ceteareth-10 Phosphate has low irritation and comedogenic ratings, making it suitable for sensitive and acne-prone skin types.
Effective emulsifier
It creates stable, smooth mixtures of oil and water, improving the texture and shelf life of creams and lotions.
Cons and cautions
Sustainability concerns
Ceteareth-10 Phosphate is often derived from palm oil, which can be associated with deforestation and habitat loss unless certified sustainable.
Potential trace contaminants
The manufacturing process may leave trace amounts of 1,4-dioxane, a possible carcinogen, though levels are typically very low and regulated.
Best for
- People with normal to dry skin looking for gentle cleansers
- Those who prefer mild, non-stripping cleansing ingredients
Use caution if
- Individuals with known allergies to ethoxylated ingredients (rare)
- Those seeking fully natural or plant-based ingredient lists
Usage tips
Safety summary
Ceteareth-10 Phosphate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Trace contaminants like 1,4-dioxane are regulated and kept to minimal levels in quality products.
Research notes
Research on Ceteareth-10 Phosphate is limited, but studies on similar ethoxylated surfactants indicate they are mild and well-tolerated. The CIR has reviewed related ingredients and found them safe for cosmetic use.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed similar ethoxylated ingredients and found them safe at typical use levels.
- Common uses
- Cleansers, Lotions, Creams, Sunscreens
- Environmental note
- Sourcing can be from palm oil; look for RSPO-certified or sustainably sourced versions to reduce environmental impact.
Good to know
- Ceteareth-10 Phosphate is often listed near the middle or end of ingredient lists because it is used in small amounts
- It is sometimes used in sunscreens to help distribute UV filters evenly
Common questions
What is Ceteareth-10 Phosphate in beauty products?
Ceteareth-10 Phosphate is a mild cleansing and emulsifying ingredient. It helps oil and water blend together in products like lotions and cleansers, so they stay smooth and don't separate. It's considered gentle on skin and is often used in formulas for sensitive skin.
What does Ceteareth-10 Phosphate do in a beauty product?
In a cosmetic product, Ceteareth-10 Phosphate sits at the boundary between oil and water droplets. Its water-loving head faces the water, while its oil-loving tail faces the oil. This stabilizes the mixture, preventing separation and giving the product a uniform texture. It also helps cleanse by lifting dirt and oil from the skin so they can be rinsed away.
Is Ceteareth-10 Phosphate safe for most people?
Ceteareth-10 Phosphate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Trace contaminants like 1,4-dioxane are regulated and kept to minimal levels in quality products.
Who should be careful with Ceteareth-10 Phosphate?
Individuals with known allergies to ethoxylated ingredients (rare) Those seeking fully natural or plant-based ingredient lists
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.