Ingredient review
Trimethyl Cyclohexenyl Acrylonitrile
INCI: TRIMETHYL-1-CYCLOHEXENYLACRYLONITRILE
A synthetic scent ingredient that adds a fresh note but offers no skincare benefit and may be a concern for those with fragrance sensitivities.
In plain English
This is a lab-made chemical that smells fresh and citrusy. It is added to products like lotions and cleansers solely for fragrance. It does not moisturize, treat, or improve your skin in any way. If you have sensitive skin or avoid synthetic fragrances, you may want to choose products without 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 Cyclohexenyl Acrylonitrile 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 Cyclohexenyl Acrylonitrile.
- 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 from the nitrile family, created in a lab to produce a fresh, citrus-like scent. It is not derived from plants or natural sources.
How it works
It evaporates from the skin's surface, releasing scent molecules that are detected by your nose. It has no active role in cleansing, moisturizing, or protecting the skin.
Pros
Pleasant fresh scent
Adds a clean, citrusy aroma that many people find uplifting and refreshing in their daily products.
Low irritation for most
At typical use levels, it is unlikely to cause problems for people without fragrance sensitivities.
Cons and cautions
No skin benefit
This ingredient is purely for scent and does not hydrate, soothe, or improve skin health in any way.
Potential allergen
Like many synthetic fragrances, it can trigger contact dermatitis or allergic reactions in sensitive individuals.
Best for
- People who enjoy scented products and have no history of fragrance allergies
- Those looking for a fresh, citrusy scent in their routine
Use caution if
- Individuals with sensitive skin, eczema, or known fragrance allergies
- Anyone following a fragrance-free or hypoallergenic skincare routine
Usage tips
Safety summary
Generally recognized as safe for most people at low concentrations, but it is a known skin sensitizer and should be avoided by those with fragrance allergies.
Research notes
Research indicates that synthetic fragrance ingredients like this one can cause allergic contact dermatitis in susceptible individuals. The EU CosIng database lists it as a fragrance allergen requiring labeling.
Common label clues
- Typical concentration
- Typically used at very low levels (under 1%) in rinse-off and leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU and US at concentrations considered safe by industry panels, but it must be listed on the label as a fragrance allergen in the EU if above certain levels.
- Common uses
- Fragranced skincare, Body lotions, Cleansers, Perfumes
- Environmental note
- As a synthetic compound, it is not biodegradable and may accumulate in the environment, though its low use levels reduce impact.
Good to know
- This ingredient is often listed near the end of an INCI list, indicating a low concentration.
- Fragrance ingredients are not required to be individually listed on labels in some regions, but this one is named here.
Common questions
What is Trimethyl Cyclohexenyl Acrylonitrile in beauty products?
This is a lab-made chemical that smells fresh and citrusy. It is added to products like lotions and cleansers solely for fragrance. It does not moisturize, treat, or improve your skin in any way. If you have sensitive skin or avoid synthetic fragrances, you may want to choose products without it.
What does Trimethyl Cyclohexenyl Acrylonitrile do in a beauty product?
It evaporates from the skin's surface, releasing scent molecules that are detected by your nose. It has no active role in cleansing, moisturizing, or protecting the skin.
Is Trimethyl Cyclohexenyl Acrylonitrile safe for most people?
Generally recognized as safe for most people at low concentrations, but it is a known skin sensitizer and should be avoided by those with fragrance allergies.
Who should be careful with Trimethyl Cyclohexenyl Acrylonitrile?
Individuals with sensitive skin, eczema, or known fragrance allergies Anyone following a fragrance-free or hypoallergenic skincare 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.