Ingredient review
Oxacyclohexadecenone
INCI: OXACYCLOHEXADECENONE
A synthetic fragrance ingredient that provides a pleasant musky scent but offers no skincare benefits and may cause sensitivity in some individuals.
In plain English
Oxacyclohexadecenone is a man-made ingredient that smells like musk or ambergris. It's added to products like lotions and perfumes to give them a warm, sweet scent. It doesn't moisturize, treat, or improve your skin in any way—it's purely for fragrance. While generally considered safe at low levels, it can be irritating for people with sensitive skin or fragrance allergies.
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
Oxacyclohexadecenone 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 Oxacyclohexadecenone.
- 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
Oxacyclohexadecenone is a synthetic macrocyclic lactone, a type of organic compound that mimics the scent of natural musk. It is produced in a lab and is a common alternative to natural musk due to ethical and cost reasons.
How it works
In a cosmetic product, oxacyclohexadecenone acts solely as a fragrance ingredient. It evaporates from the skin after application, releasing its scent molecules into the air. It does not interact with the skin's biology or provide any functional benefit beyond smell.
Pros
Pleasant scent
Adds a warm, sweet, musky aroma that many find appealing and can make a product feel more luxurious.
Low irritation for most
At typical low concentrations, it is generally well-tolerated by people without fragrance sensitivities.
Cons and cautions
No skincare benefit
This ingredient is purely for fragrance and does not hydrate, soothe, or improve skin health in any way.
Potential allergen
Like many fragrance ingredients, 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 sensitivity
- Those looking for a subtle, warm fragrance in their routine
Use caution if
- Individuals with known fragrance allergies or very sensitive skin
- Anyone following a fragrance-free skincare regimen
Usage tips
Safety summary
Oxacyclohexadecenone is considered safe for use in cosmetics at low concentrations by major regulatory bodies. However, as a fragrance ingredient, it can cause allergic reactions or irritation in sensitive individuals. The EU requires it to be listed on the label if present above a certain threshold.
Research notes
Research indicates that oxacyclohexadecenone has low acute toxicity and is not a significant skin sensitizer in the general population. However, like all fragrance materials, it can be an allergen for a subset of people. Studies on environmental persistence suggest it breaks down more readily than some older synthetic musks.
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 countries, subject to concentration limits and labeling requirements for allergens.
- Common uses
- Perfumes, Body lotions, Facial moisturizers, Cleansers
- Environmental note
- Macrocyclic musks like oxacyclohexadecenone are generally considered more biodegradable and less persistent in the environment than older polycyclic musk compounds.
Good to know
- Oxacyclohexadecenone is also known as Ambrettolide and is often listed under 'Parfum' or 'Fragrance' on ingredient labels.
- It is considered a 'macrocyclic musk,' which is less likely to accumulate in the environment compared to older synthetic musks.
Common questions
What is Oxacyclohexadecenone in beauty products?
Oxacyclohexadecenone is a man-made ingredient that smells like musk or ambergris. It's added to products like lotions and perfumes to give them a warm, sweet scent. It doesn't moisturize, treat, or improve your skin in any way—it's purely for fragrance. While generally considered safe at low levels, it can be irritating for people with sensitive skin or fragrance allergies.
What does Oxacyclohexadecenone do in a beauty product?
In a cosmetic product, oxacyclohexadecenone acts solely as a fragrance ingredient. It evaporates from the skin after application, releasing its scent molecules into the air. It does not interact with the skin's biology or provide any functional benefit beyond smell.
Is Oxacyclohexadecenone safe for most people?
Oxacyclohexadecenone is considered safe for use in cosmetics at low concentrations by major regulatory bodies. However, as a fragrance ingredient, it can cause allergic reactions or irritation in sensitive individuals. The EU requires it to be listed on the label if present above a certain threshold.
Who should be careful with Oxacyclohexadecenone?
Individuals with known fragrance allergies or very sensitive skin Anyone following a fragrance-free skincare regimen
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.