Ingredient review
Ceteth-5 Stearate
INCI: CETETH-5 STEARATE
A gentle emulsifier that helps create stable, creamy textures without common irritation.
In plain English
Ceteth-5 Stearate is a semi-synthetic ingredient used to mix oil and water in creams and lotions. It is made by attaching a small chain of ethylene glycol (PEG-5) to cetyl alcohol and stearic acid, both fatty compounds found in plants like coconut or palm. This ingredient helps your moisturizer feel smooth and spread easily without separating. It is considered very mild and unlikely to clog pores or cause irritation, 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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ceteth-5 Stearate 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-5 Stearate.
- 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-5 Stearate is a non-ionic emulsifier derived from cetyl alcohol and stearic acid, modified with 5 units of ethylene glycol (PEG-5). It belongs to the broader family of PEG ethers and esters used in cosmetics to stabilize oil-in-water emulsions.
How it works
In a formula, Ceteth-5 Stearate sits at the boundary between oil and water droplets, reducing surface tension so they mix into a stable, uniform cream or lotion. It also helps other ingredients spread evenly on the skin and can improve the texture and feel of a product.
Pros
Gentle on skin
Ceteth-5 Stearate has a low irritation risk, making it suitable for sensitive skin and daily use.
Stable emulsions
It helps creams and lotions stay mixed and consistent over time, so you don't get watery separation.
Cons and cautions
Sustainability concerns
It is often derived from palm oil, which can be linked to deforestation unless certified sustainable.
Semi-synthetic origin
Not suitable for consumers seeking 100% natural or organic skincare products.
Best for
- People with normal to dry skin looking for a gentle moisturizer
- Those with sensitive skin who react to stronger emulsifiers
Use caution if
- Individuals with known allergies to PEG compounds (rare)
- Those seeking fully natural or organic formulations
Usage tips
Safety summary
Ceteth-5 Stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. As with all PEG compounds, purity is important, but modern manufacturing ensures low levels of impurities like 1,4-dioxane.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated similar PEG stearates and found them safe for use in cosmetics. No specific studies on Ceteth-5 Stearate alone are available, but its chemical class is well-established as safe.
Common label clues
- Typical concentration
- 1% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. No concentration limits are specified, but typical use is under 5%.
- Common uses
- Moisturizers, Creams, Lotions, Sunscreens
- Environmental note
- Derived from plant-based fatty acids, but sourcing from palm oil can impact rainforests. Look for RSPO-certified palm or coconut-derived alternatives.
Good to know
- Ceteth-5 Stearate is often listed near the middle of ingredient lists, indicating moderate concentration.
- It is not a preservative; products containing it still need a proper preservation system.
Common questions
What is Ceteth-5 Stearate in beauty products?
Ceteth-5 Stearate is a semi-synthetic ingredient used to mix oil and water in creams and lotions. It is made by attaching a small chain of ethylene glycol (PEG-5) to cetyl alcohol and stearic acid, both fatty compounds found in plants like coconut or palm. This ingredient helps your moisturizer feel smooth and spread easily without separating. It is considered very mild and unlikely to clog pores or cause irritation, making it a common choice for sensitive skin formulas.
What does Ceteth-5 Stearate do in a beauty product?
In a formula, Ceteth-5 Stearate sits at the boundary between oil and water droplets, reducing surface tension so they mix into a stable, uniform cream or lotion. It also helps other ingredients spread evenly on the skin and can improve the texture and feel of a product.
Is Ceteth-5 Stearate safe for most people?
Ceteth-5 Stearate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. As with all PEG compounds, purity is important, but modern manufacturing ensures low levels of impurities like 1,4-dioxane.
Who should be careful with Ceteth-5 Stearate?
Individuals with known allergies to PEG compounds (rare) Those seeking fully natural or organic formulations
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.