Ingredient review

Cyclohexylidenecyclohexanone

INCI: CYCLOHEXYLIDENECYCLOHEXANONE

A synthetic scent ingredient that adds a warm, woody note but offers no skincare benefit and may be unnecessary for sensitive noses.

beautyskincarefragrance

In plain English

This is a lab-made chemical that gives products a pleasant woody or musky smell. It doesn't moisturize, protect, or treat your skin—it's purely for fragrance. If you prefer unscented products, you can skip it without missing any skin benefits.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Cyclohexylidenecyclohexanone 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Cyclohexylidenecyclohexanone.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic organic compound belonging to the ketone family, used exclusively as a fragrance ingredient in cosmetics and personal care products.

How it works

It evaporates from the skin after application, releasing a scent that interacts with olfactory receptors. It does not actively change the skin's structure or function.

Pros

Pleasant scent

Adds a warm, woody note that many find appealing in lotions and cleansers.

Low irritation for most

At typical low concentrations, it rarely causes problems for people without fragrance sensitivities.

Cons and cautions

No skin benefit

It only provides scent—no moisturizing, anti-aging, or protective effects for your skin.

Potential allergen

Like many fragrance ingredients, it can trigger allergic reactions or irritation in sensitive individuals.

Best for

  • People who enjoy a woody, warm scent in their skincare routine
  • Those without fragrance sensitivities

Use caution if

  • Individuals with known fragrance allergies or sensitive, reactive skin

Usage tips

Patch test any new product containing this ingredient if you have sensitive skin.
If you prefer fragrance-free skincare, look for products labeled 'fragrance-free' rather than 'unscented' (which may still contain masking fragrances).

Safety summary

Generally recognized as safe for most people at low concentrations used in cosmetics, but can cause allergic reactions in sensitive individuals. The International Fragrance Association (IFRA) sets usage limits to minimize risk.

Research notes

Limited peer-reviewed research specifically on cyclohexylidenecyclohexanone; safety assessments rely on general fragrance ingredient data and industry guidelines.

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, US, and many other regions, but must be listed on the ingredient label if used at certain concentrations.
Common uses
Fragranced skincare, Perfumes, Body lotions, Cleansers
Environmental note
As a synthetic compound, its environmental persistence and bioaccumulation potential are not well-studied; natural fragrance alternatives may have a lower environmental footprint.

Good to know

  • This ingredient is not required to be listed separately on labels if it falls under 'fragrance' or 'parfum' in some regions.
  • It is not a preservative, active, or emollient—it's purely a scent additive.

Common questions

What is Cyclohexylidenecyclohexanone in beauty products?

This is a lab-made chemical that gives products a pleasant woody or musky smell. It doesn't moisturize, protect, or treat your skin—it's purely for fragrance. If you prefer unscented products, you can skip it without missing any skin benefits.

What does Cyclohexylidenecyclohexanone do in a beauty product?

It evaporates from the skin after application, releasing a scent that interacts with olfactory receptors. It does not actively change the skin's structure or function.

Is Cyclohexylidenecyclohexanone safe for most people?

Generally recognized as safe for most people at low concentrations used in cosmetics, but can cause allergic reactions in sensitive individuals. The International Fragrance Association (IFRA) sets usage limits to minimize risk.

Who should be careful with Cyclohexylidenecyclohexanone?

Individuals with known fragrance allergies or sensitive, reactive skin

Research sources

IFRA Standards on Fragrance IngredientsOpenCosIng - European Commission DatabaseOpen

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.