Ingredient review
Cyclohexanone Diethyl Acetal
INCI: Cyclohexanone Diethyl Acetal
A synthetic fragrance ingredient that adds a fresh scent but offers no skincare benefits and may trigger sensitivity in some people.
In plain English
This is a man-made chemical used to give skincare and beauty products a pleasant smell, often described as fresh, green, or slightly floral. It doesn't moisturize, treat, or improve your skin in any way—its only job is to make the product smell nice. Because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially for those with 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.
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
Cyclohexanone Diethyl Acetal 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 Cyclohexanone Diethyl Acetal.
- 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
Cyclohexanone Diethyl Acetal is a synthetic organic compound belonging to the acetal family. It is created in a lab by reacting cyclohexanone with ethanol. In cosmetics, it is used exclusively as a fragrance ingredient to impart a fresh, green, or floral scent.
How it works
As a fragrance ingredient, it works by releasing volatile molecules that interact with olfactory receptors in the nose, creating a perception of a specific scent. In a product, it is blended with other fragrance components to achieve a desired overall aroma. It does not interact with the skin's biology or provide any functional skincare benefit.
Pros
Pleasant scent
Provides a fresh, green, or floral note that can make the product more enjoyable to use.
Low concentration needed
Effective at very low levels, so overall exposure is minimal for most users.
Cons and cautions
No skincare benefit
This ingredient does nothing for your skin—it only adds scent, so it's an unnecessary addition for those seeking functional products.
Potential allergen
As a synthetic fragrance, it can cause contact dermatitis or allergic reactions in sensitive individuals, especially with repeated use.
Best for
- People who enjoy scented skincare and have no history of fragrance allergies
- Those using rinse-off products like body washes where exposure is brief
Use caution if
- Individuals with sensitive, reactive, or eczema-prone skin
- Anyone with a known allergy or sensitivity to synthetic fragrances
Usage tips
Safety summary
Cyclohexanone Diethyl Acetal is considered safe for use in cosmetics at the low concentrations typical for fragrance ingredients. However, like many synthetic fragrances, it can cause skin irritation or allergic reactions in susceptible individuals. Regulatory bodies and industry groups monitor its use to ensure consumer safety.
Research notes
Research on this specific compound is limited, but it belongs to a class of acetal fragrance ingredients that have been evaluated for safety by the Research Institute for Fragrance Materials (RIFM). Studies indicate low acute toxicity and low skin irritation potential at typical use levels, though individual sensitivity varies.
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 industry safety standards.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, its environmental fate is not fully studied, but it is expected to be biodegradable under standard conditions.
Good to know
- This ingredient is often not listed individually on labels—it may be hidden under the general term 'fragrance' or 'parfum'.
- Regulatory bodies like the International Fragrance Association (IFRA) set safety standards for its use in cosmetics.
Common questions
What is Cyclohexanone Diethyl Acetal in beauty products?
This is a man-made chemical used to give skincare and beauty products a pleasant smell, often described as fresh, green, or slightly floral. It doesn't moisturize, treat, or improve your skin in any way—its only job is to make the product smell nice. Because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially for those with sensitive skin.
What does Cyclohexanone Diethyl Acetal do in a beauty product?
As a fragrance ingredient, it works by releasing volatile molecules that interact with olfactory receptors in the nose, creating a perception of a specific scent. In a product, it is blended with other fragrance components to achieve a desired overall aroma. It does not interact with the skin's biology or provide any functional skincare benefit.
Is Cyclohexanone Diethyl Acetal safe for most people?
Cyclohexanone Diethyl Acetal is considered safe for use in cosmetics at the low concentrations typical for fragrance ingredients. However, like many synthetic fragrances, it can cause skin irritation or allergic reactions in susceptible individuals. Regulatory bodies and industry groups monitor its use to ensure consumer safety.
Who should be careful with Cyclohexanone Diethyl Acetal?
Individuals with sensitive, reactive, or eczema-prone skin Anyone with a known allergy or sensitivity to synthetic fragrances
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.