Ingredient review
Trimethylcyclohexene Methanol
INCI: D-Trimethyl-3-Cyclohexene-1-Methanol
A synthetic fragrance ingredient that adds scent but offers no skincare benefit and may irritate sensitive skin.
In plain English
This is a man-made chemical added to products to give them a pleasant smell, often described as fresh, floral, or woody. It does not moisturize, treat, or improve your skin in any way—it's purely for scent. Because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially if you have sensitive skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Trimethylcyclohexene Methanol can be useful, but watch for some irritation potential.
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 Trimethylcyclohexene Methanol.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 from the terpene family, specifically a derivative of cyclohexene, used as a fragrance ingredient in cosmetics and personal care products.
How it works
It evaporates from the skin's surface, releasing scent molecules that are detected by olfactory receptors. It has no active skincare function—its only role is to provide a pleasant fragrance experience.
Pros
Pleasant scent
Provides a fresh, floral, or woody fragrance that can make your skincare routine more enjoyable.
Low comedogenic risk
Unlikely to clog pores, making it safe for acne-prone skin in terms of breakouts.
Cons and cautions
No skincare benefit
This ingredient only adds scent—it does not hydrate, soothe, or improve your skin's health.
Potential irritant
Can cause redness, itching, or stinging, especially on sensitive or compromised skin.
Best for
- People who enjoy scented skincare and have no history of fragrance sensitivity
- Those looking for a fresh, floral, or woody scent in their routine
Use caution if
- Individuals with sensitive, reactive, or eczema-prone skin
- Anyone with a known fragrance allergy or contact dermatitis
Usage tips
Safety summary
Generally recognized as safe for use in cosmetics at low concentrations, but it is a known skin sensitizer and may cause allergic reactions in susceptible individuals. The Cosmetic Ingredient Review (CIR) panel has not specifically evaluated this ingredient, but similar fragrance compounds are considered safe when used within limits.
Research notes
Limited peer-reviewed research specifically on this compound. Most safety data comes from fragrance industry assessments and general studies on fragrance allergens. It is classified as a potential skin sensitizer in animal studies.
Common label clues
- Typical concentration
- Typically used at very low concentrations (under 1%) in rinse-off and leave-on products.
- Regulatory status
- Approved for use in cosmetics in the US and EU. In the EU, it must be listed as a fragrance allergen if present above 0.01% in leave-on products or 0.1% in rinse-off products.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, it may not be biodegradable and could accumulate in the environment. Its environmental impact is not well-studied.
Good to know
- Fragrance ingredients like this one are often listed simply as 'fragrance' or 'parfum' on labels, so it's hard to know exactly which ones are in a product.
- In the EU, fragrance allergens must be listed separately if they exceed certain concentrations, but this specific ingredient may not always be individually labeled.
Common questions
What is Trimethylcyclohexene Methanol in beauty products?
This is a man-made chemical added to products to give them a pleasant smell, often described as fresh, floral, or woody. It does not moisturize, treat, or improve your skin in any way—it's purely for scent. Because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially if you have sensitive skin.
What does Trimethylcyclohexene Methanol do in a beauty product?
It evaporates from the skin's surface, releasing scent molecules that are detected by olfactory receptors. It has no active skincare function—its only role is to provide a pleasant fragrance experience.
Is Trimethylcyclohexene Methanol safe for most people?
Generally recognized as safe for use in cosmetics at low concentrations, but it is a known skin sensitizer and may cause allergic reactions in susceptible individuals. The Cosmetic Ingredient Review (CIR) panel has not specifically evaluated this ingredient, but similar fragrance compounds are considered safe when used within limits.
Who should be careful with Trimethylcyclohexene Methanol?
Individuals with sensitive, reactive, or eczema-prone skin Anyone with a known fragrance allergy or contact dermatitis
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.