Ingredient review
Hydroxycyclohexyl Methyl Ketone
INCI: Hydroxycyclohexyl Methyl Ketone
A synthetic fragrance ingredient that provides a sweet, floral scent; generally considered safe at low concentrations but may cause sensitivity in some individuals.
In plain English
Hydroxycyclohexyl Methyl Ketone is a man-made chemical added to skincare and beauty products to give them a pleasant, sweet, floral smell. It is not a natural extract but is created in a lab. Because it is a fragrance ingredient, it can sometimes cause skin irritation or allergic reactions in people with sensitive skin, though this is not common. It is used in very small amounts, so the risk is generally low for most people.
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
Hydroxycyclohexyl Methyl Ketone 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 Hydroxycyclohexyl Methyl Ketone.
- 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 used primarily as a fragrance ingredient in cosmetics and personal care products. It is not derived from plants or animals.
How it works
It works by evaporating from the skin and interacting with olfactory receptors in the nose, creating a perception of a sweet, floral scent. In the product, it simply adds fragrance and has no known active skincare benefits.
Pros
Pleasant scent
Adds a sweet, floral fragrance that many people find appealing, improving the overall user experience.
Low concentration use
Used in very small amounts, which reduces the likelihood of irritation for most people.
Cons and cautions
Potential allergen
As a synthetic fragrance ingredient, it can trigger allergic reactions or contact dermatitis in sensitive individuals, especially with repeated use.
No skincare benefit
Provides only fragrance and does not moisturize, protect, or improve skin health in any way.
Best for
- People who enjoy scented skincare and have no history of fragrance allergies
- Those looking for a synthetic floral scent alternative to natural extracts
Use caution if
- Individuals with known fragrance allergies or very sensitive skin
- Anyone who prefers fragrance-free products to minimize irritation risk
Usage tips
Safety summary
Generally recognized as safe for use in cosmetics at low concentrations by major regulatory bodies, but it can cause skin sensitization in a small percentage of users. Those with fragrance allergies should avoid it.
Research notes
Limited peer-reviewed research specifically on Hydroxycyclohexyl Methyl Ketone, but it is included in fragrance allergen studies. The EU Scientific Committee on Consumer Safety (SCCS) has reviewed similar fragrance ingredients and found them safe within limits.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1% in leave-on products.
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions, subject to concentration limits set by fragrance safety standards (e.g., IFRA).
- 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 usage levels reduce impact.
Good to know
- This ingredient is often listed simply as 'fragrance' or 'parfum' on labels, so it may not appear by its full name.
- Regulatory bodies like the IFRA (International Fragrance Association) set safety guidelines for its use in cosmetics.
Common questions
What is Hydroxycyclohexyl Methyl Ketone in beauty products?
Hydroxycyclohexyl Methyl Ketone is a man-made chemical added to skincare and beauty products to give them a pleasant, sweet, floral smell. It is not a natural extract but is created in a lab. Because it is a fragrance ingredient, it can sometimes cause skin irritation or allergic reactions in people with sensitive skin, though this is not common. It is used in very small amounts, so the risk is generally low for most people.
What does Hydroxycyclohexyl Methyl Ketone do in a beauty product?
It works by evaporating from the skin and interacting with olfactory receptors in the nose, creating a perception of a sweet, floral scent. In the product, it simply adds fragrance and has no known active skincare benefits.
Is Hydroxycyclohexyl Methyl Ketone safe for most people?
Generally recognized as safe for use in cosmetics at low concentrations by major regulatory bodies, but it can cause skin sensitization in a small percentage of users. Those with fragrance allergies should avoid it.
Who should be careful with Hydroxycyclohexyl Methyl Ketone?
Individuals with known fragrance allergies or very sensitive skin Anyone who prefers fragrance-free products to minimize irritation risk
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.