Cetearyl Alcohol: Comedogenic Rating & Ingredient Analysis
Cetearyl alcohol is not a single molecule but a blend of cetyl and stearyl alcohols, two fatty alcohols combined to give formulators the best of both. Like its components, it is a soft, waxy, conditioning ingredient, and despite the alcohol in its name it does not dry or strip the skin. It is one of the most common emulsifying and thickening ingredients in skincare, quietly doing the work of holding creams together and giving them a smooth, stable, luxurious texture. Because it combines the properties of two well-tolerated fatty alcohols, it is extremely widely used, including in gentle products for dry and sensitive skin.
Quick facts
- Comedogenic rating
- measured (Fulton 1989)
- Irritation risk
- Low
- Effective pH
- —
- Typical strength
- 1–15%
- Pregnancy
- Considered safe
- Suits skin types
- drynormalsensitivecombinationmature
Where this number comes from
Read directly from Table I of Fulton's 1989 paper — the primary source, not one of the copied tables that circulate online.
Fulton read his own scale as 0-1 not significant, 2-3 borderline, 4-5 positive. The assay is the rabbit ear at 10% dilution, which the paper itself calls extremely sensitive and not fully predictive of human skin. Ratings describe the raw ingredient; concentration and formulation change real-world behaviour.
Caution profile
The four published fields on this page, on one 0–5 scale. Further from the centre means more care is needed — never that the ingredient is worse.
Derived, not measured: pore-clogging is the published comedogenic rating; irritation maps low/moderate/high to 1/3/5; pregnancy maps safe/caution/avoid to 0/3/5; skin-type limits is how many of the seven skin types this entry does NOT list. Every input is printed in words in the quick-facts card above.
Show the numbers
| Metric | 0–5 | Published field |
|---|---|---|
| Pore-clogging | 2 | 2/5 |
| Irritation | 1 | Low |
| Skin-type limits | 1.4 | 5/7 |
| Pregnancy | 0 | Considered safe |
Working pH and typical strength
Where this ingredient is formulated to sit, and at what concentration.
Both bars come from the fields above: the pH window and the typical strength range published for this ingredient. The tinted column is healthy skin's surface pH (about 4.7–5.75).
Show the numbers
| Metric | 0–5 |
|---|---|
| Typical strength | 1–15% |
What is it?
Cetearyl alcohol is a defined mixture of cetyl alcohol and stearyl alcohol, the sixteen- and eighteen-carbon fatty alcohols. Blending them produces an ingredient with balanced emollient and structural properties, which is why it is such a versatile formulation staple. It works as an emollient that softens the skin, and as an emulsion stabiliser and thickener that keeps oil and water phases from separating while building a creamy, stable body. It is non-volatile and conditioning, the opposite of drying alcohols. As a fatty alcohol blend it shares their moderate comedogenic rating and their generally excellent tolerance.
Benefits
Balanced conditioning emollient
Combining cetyl and stearyl alcohols, it softens and smooths the skin with a balanced feel, giving creams a conditioned, comfortable finish rather than a stripped one.
Reliable emulsion stabiliser
It keeps the oil and water phases of a cream blended, preventing separation and giving moisturisers and lotions their stable, smooth, long-lasting texture.
Versatile thickener
As a thickener it builds body and a luxurious feel in a huge range of products, which is why cetearyl alcohol is one of skincare's most ubiquitous texture ingredients.
Gentle and widely tolerated
Being a blend of two mild fatty alcohols, it is generally non-irritating and suits sensitive and dry skin, appearing in countless fragrance-free, gentle formulations.
How to use
You will find cetearyl alcohol within moisturisers, cleansers, masks and conditioners rather than using it by itself, so simply apply those products as usual. If ingredient lists worried you because of the word alcohol, cetearyl alcohol is firmly in the fatty, non-drying, skin-softening category. It suits nearly all skin types, and only the most congestion-prone might want to note its moderate comedogenic rating and observe how very rich, emollient-heavy creams affect their skin over time.
Side effects
Cetearyl alcohol is gentle and rarely irritating, and true allergy to fatty alcohols is uncommon. Its moderate comedogenic rating means that, for a minority of very acne-prone people, rich products built around it could contribute to congestion, but most people use it with no issue. It is not a drying alcohol and does not cause the dehydration or tightness associated with volatile alcohols.
Who should avoid it
Almost no one needs to avoid cetearyl alcohol; it suits dry, normal, combination and sensitive skin and is regarded as safe in pregnancy. Only those with a rare fatty-alcohol sensitivity or extremely congestion-prone skin reacting to very rich creams might need to be selective. It does not warrant avoidance on the mistaken assumption that it is a drying alcohol.
Pairs well with
Frequently asked questions
What is cetearyl alcohol made of?
It is a blend of cetyl alcohol and stearyl alcohol, two fatty alcohols. Combining them gives a balanced emollient and thickener, which is why cetearyl alcohol is such a common, versatile ingredient in creams.
Is cetearyl alcohol drying?
No. Despite the word alcohol, it is a fatty alcohol blend that conditions and softens the skin, completely unlike drying volatile alcohols. It helps creams feel smooth and comfortable rather than stripping.
Does cetearyl alcohol clog pores?
It has a moderate comedogenic rating, so for most people it does not, but those very prone to congestion should observe how very rich, emollient-heavy products built around it affect their skin.
Is cetearyl alcohol safe for sensitive skin?
Yes, generally. As a blend of two mild fatty alcohols it is gentle and widely tolerated, appearing in many fragrance-free, sensitive-skin creams. A patch test is still sensible with any new product.
Sources & further reading
Medical disclaimer
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