No known benefits

Ceteareth-25 at a glance

  • Fatty alcohol that functions as an emulsifier and surfactant
  • May be plant or animal derived
  • Helps keep ingredients soluble within a formula
  • Adds body to creams and lotions

Ceteareth-25 description

Ceteareth-25 is a fatty alcohol that functions as an emulsifier and surfactant in cosmetics. It may be plant- or animal-derived or made synthetically (Paula’s Choice Skincare uses the synthetic and plant-derived types). Ceteareth-25 also helps to keep ingredients soluble within a formula, allowing them to remain dispersed evenly throughout an emulsion. This ingredient is one of several ceteareths deemed safe as used in cosmetics. Concentration ranges from 1.3–10% depending on the type of formula and desired aesthetics; lower amounts may also be used, especially if ceteareth-25 is part of a blend.

Ceteareth-25 references

  • Clujul Medical, April 2017, pages 212–219
  • International Journal of Toxicology, April 1999, pages 41–49
  • http://www.cosmeticsinfo.org/ingredient/ceteareths

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.