Ingredient review
Trimethyl Cyclohexadienyl Butanone
INCI: TRIMETHYL-1,3-CYCLOHEXADIENYLBUTAN-2-ONE
A synthetic fragrance ingredient that adds scent but offers no skincare benefits; safe at low levels but may cause sensitivity in some people.
In plain English
This is a man-made chemical used to give products a pleasant smell, often described as warm, woody, or floral. It doesn't moisturize, treat, or improve your skin—it's purely for fragrance. Like many fragrance ingredients, it's used in tiny amounts and is generally considered safe, but people with very sensitive skin or fragrance allergies may 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
Trimethyl Cyclohexadienyl Butanone 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 Trimethyl Cyclohexadienyl Butanone.
- 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 organic compound belonging to the class of cyclohexadiene derivatives, used exclusively as a fragrance ingredient in cosmetics and personal care products.
How it works
It evaporates from the skin's surface, releasing scent molecules that interact with olfactory receptors. It has no known functional role in skincare beyond providing fragrance.
Pros
Pleasant scent
Adds a warm, woody, or floral note that can make your skincare routine more enjoyable.
Low irritation at low levels
When used in tiny amounts as typical, it rarely causes problems for most people.
Cons and cautions
No skin benefit
This ingredient does nothing for your skin—no hydration, anti-aging, or barrier support.
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 history of fragrance allergies
- Those looking for a warm, woody scent profile
Use caution if
- Individuals with known fragrance allergies or very sensitive skin
- Anyone preferring fragrance-free skincare
Usage tips
Safety summary
Generally recognized as safe at the low concentrations used in cosmetics. However, it can be a contact allergen for some individuals, so those with fragrance sensitivities should exercise caution.
Research notes
Limited peer-reviewed research specifically on this compound, but it is included in fragrance allergen lists by the EU Scientific Committee on Consumer Safety (SCCS). Its safety is managed through industry guidelines like those from IFRA.
Common label clues
- Typical concentration
- Typically used at very low levels (less than 1%) in finished products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions, with usage limits set by IFRA to ensure safety at low concentrations.
- Common uses
- Perfumes, Fragranced skincare, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, its environmental persistence is not well-documented, but fragrance ingredients in general can contribute to water pollution if not properly treated.
Good to know
- This ingredient is often listed simply as 'fragrance' or 'parfum' on labels, so you may not see its full name.
- Regulatory bodies like the IFRA (International Fragrance Association) set safe usage limits for this compound.
Common questions
What is Trimethyl Cyclohexadienyl Butanone in beauty products?
This is a man-made chemical used to give products a pleasant smell, often described as warm, woody, or floral. It doesn't moisturize, treat, or improve your skin—it's purely for fragrance. Like many fragrance ingredients, it's used in tiny amounts and is generally considered safe, but people with very sensitive skin or fragrance allergies may want to avoid it.
What does Trimethyl Cyclohexadienyl Butanone do in a beauty product?
It evaporates from the skin's surface, releasing scent molecules that interact with olfactory receptors. It has no known functional role in skincare beyond providing fragrance.
Is Trimethyl Cyclohexadienyl Butanone safe for most people?
Generally recognized as safe at the low concentrations used in cosmetics. However, it can be a contact allergen for some individuals, so those with fragrance sensitivities should exercise caution.
Who should be careful with Trimethyl Cyclohexadienyl Butanone?
Individuals with known fragrance allergies or very sensitive skin Anyone preferring fragrance-free skincare
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.