Ingredient review
Ceteareth-3
INCI: Ceteareth-3
Ceteareth-3 is a reliable emulsifier that helps create smooth, stable creams and lotions with low irritation potential.
In plain English
Ceteareth-3 is an ingredient that helps oil and water mix together in your skincare products. Without it, creams and lotions would separate into watery and oily layers. It is made from fatty alcohols (derived from natural oils) and ethylene oxide, a common building block in many cosmetic ingredients. In your moisturizer, it ensures the product feels smooth and applies evenly without feeling greasy or watery.
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-3 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-3.
- 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-3 is a semi-synthetic emulsifier made by reacting cetearyl alcohol (a blend of fatty alcohols from coconut or palm oil) with ethylene oxide. It belongs to the ceteareth family, where the number indicates the average length of the polyethylene glycol chain.
How it works
Ceteareth-3 has both water-loving and oil-loving parts, allowing it to bridge oil and water phases in a formula. When you apply a product containing it, it helps the cream spread evenly on your skin and prevents the formula from separating over time. It also has mild cleansing properties, helping to remove dirt and excess oil.
Pros
Gentle on skin
Ceteareth-3 has a low irritation risk, making it suitable for most skin types, including sensitive skin, when used in typical concentrations.
Improves product feel
It helps creams and lotions feel smooth and lightweight, avoiding the greasy or watery separation that can happen with poorly formulated products.
Cons and cautions
Potential contaminant concern
As an ethoxylated ingredient, trace amounts of 1,4-dioxane can form during manufacturing. Reputable brands purify to remove this, but it is a consideration for those avoiding all ethoxylated compounds.
Sustainability issues
Ceteareth-3 is often derived from palm oil, which has environmental and ethical concerns related to deforestation. Look for RSPO-certified sources if this matters to you.
Best for
- People with normal to dry skin
- Those looking for stable, non-greasy moisturizers
Use caution if
- Individuals with known sensitivity to ethoxylated ingredients
- Those seeking 100% natural or organic formulations
Usage tips
Safety summary
Ceteareth-3 is considered safe for use in cosmetics at typical concentrations. The main safety consideration is the potential presence of trace 1,4-dioxane, a byproduct of ethoxylation. Reputable manufacturers use purification steps to keep levels very low, and regulatory bodies consider it safe when properly manufactured.
Research notes
The Cosmetic Ingredient Review (CIR) panel has reviewed ceteareth compounds and concluded they are safe for use in cosmetics. Studies indicate low skin irritation and sensitization potential. Research on 1,4-dioxane contamination focuses on manufacturing controls rather than the ingredient itself.
Common label clues
- Typical concentration
- Typically 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has deemed ceteareth compounds safe as used in cosmetics, with the caveat that 1,4-dioxane levels should be minimized.
- Common uses
- Moisturizers, Cleansers, Lotions, Creams
- Environmental note
- Ceteareth-3 is typically derived from palm or coconut oil. Palm oil production can contribute to deforestation, so choosing products with RSPO-certified palm derivatives supports more sustainable sourcing.
Good to know
- The number '3' in Ceteareth-3 indicates the average length of the polyethylene glycol chain, which affects its water solubility and emulsifying strength.
- Ceteareth-3 is often used alongside other emulsifiers like Cetearyl Alcohol to create a stable emulsion.
Common questions
What is Ceteareth-3 in beauty products?
Ceteareth-3 is an ingredient that helps oil and water mix together in your skincare products. Without it, creams and lotions would separate into watery and oily layers. It is made from fatty alcohols (derived from natural oils) and ethylene oxide, a common building block in many cosmetic ingredients. In your moisturizer, it ensures the product feels smooth and applies evenly without feeling greasy or watery.
What does Ceteareth-3 do in a beauty product?
Ceteareth-3 has both water-loving and oil-loving parts, allowing it to bridge oil and water phases in a formula. When you apply a product containing it, it helps the cream spread evenly on your skin and prevents the formula from separating over time. It also has mild cleansing properties, helping to remove dirt and excess oil.
Is Ceteareth-3 safe for most people?
Ceteareth-3 is considered safe for use in cosmetics at typical concentrations. The main safety consideration is the potential presence of trace 1,4-dioxane, a byproduct of ethoxylation. Reputable manufacturers use purification steps to keep levels very low, and regulatory bodies consider it safe when properly manufactured.
Who should be careful with Ceteareth-3?
Individuals with known sensitivity to ethoxylated ingredients Those seeking 100% 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.