Ingredient review
Methylcyclotridecanone
INCI: METHYLCYCLOTRIDECANONE
A synthetic musk used for scent; generally safe at low levels but may cause irritation in sensitive individuals.
In plain English
Methylcyclotridecanone is a man-made ingredient that gives products a soft, musky smell. It's used in tiny amounts to make lotions, perfumes, and cleansers smell pleasant. While it's considered safe for most people, those with very sensitive skin or fragrance allergies might want to avoid it.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Methylcyclotridecanone 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 Methylcyclotridecanone.
- 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
A synthetic macrocyclic ketone, part of the musk fragrance family, created in a lab to mimic natural musk scents.
How it works
It evaporates slowly from the skin, releasing a warm, musky aroma that enhances the sensory experience of a product. It does not provide any skincare benefit beyond fragrance.
Pros
Pleasant scent
Provides a warm, musky fragrance that many find appealing and long-lasting.
Low irritation risk for most
At typical low concentrations, it rarely causes problems for people without fragrance sensitivities.
Cons and cautions
No skincare benefit
This ingredient only adds scent; it does not moisturize, protect, or improve skin health.
Potential allergen
Like many fragrance ingredients, it can trigger allergic reactions or irritation in sensitive individuals.
Best for
- People who enjoy scented skincare and have no known fragrance allergies
- Those looking for a subtle, warm musk note in their products
Use caution if
- Individuals with fragrance allergies or very sensitive skin
- Anyone avoiding synthetic fragrances in their routine
Usage tips
Safety summary
Generally recognized as safe for use in cosmetics at low concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar synthetic musks and found them safe as used. However, individuals with fragrance allergies should exercise caution.
Research notes
Research on methylcyclotridecanone specifically is limited, but it belongs to a class of synthetic musks that have been studied for safety. Studies indicate low acute toxicity and low skin irritation potential at typical use levels.
Common label clues
- Typical concentration
- Very low, often less than 1%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other countries, subject to concentration limits and labeling requirements for allergens.
- Common uses
- Perfumes, Body lotions, Cleansers, Hair products
- Environmental note
- Some synthetic musks have raised concerns about persistence in the environment, but methylcyclotridecanone is considered less bioaccumulative than older musk types.
Good to know
- Methylcyclotridecanone is often listed simply as 'fragrance' or 'parfum' on ingredient labels.
- Synthetic musks like this one are designed to be more consistent and sustainable than natural musk from animals.
Common questions
What is Methylcyclotridecanone in beauty products?
Methylcyclotridecanone is a man-made ingredient that gives products a soft, musky smell. It's used in tiny amounts to make lotions, perfumes, and cleansers smell pleasant. While it's considered safe for most people, those with very sensitive skin or fragrance allergies might want to avoid it.
What does Methylcyclotridecanone do in a beauty product?
It evaporates slowly from the skin, releasing a warm, musky aroma that enhances the sensory experience of a product. It does not provide any skincare benefit beyond fragrance.
Is Methylcyclotridecanone safe for most people?
Generally recognized as safe for use in cosmetics at low concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar synthetic musks and found them safe as used. However, individuals with fragrance allergies should exercise caution.
Who should be careful with Methylcyclotridecanone?
Individuals with fragrance allergies or very sensitive skin Anyone avoiding synthetic fragrances in their routine
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.