Ingredient review
Amylcinnamal Diethyl Acetal
INCI: AMYLCINNAMAL DIETHYL ACETAL
A synthetic floral scent ingredient that may cause skin irritation or allergic reactions in sensitive individuals.
In plain English
Amylcinnamal Diethyl Acetal is a man-made chemical added to products to give them a sweet, floral smell similar to jasmine. It is a modified version of another fragrance ingredient called amylcinnamal, which is known to be a common allergen. Because of this, products containing it must list it separately on the label in many regions. While it is generally safe for most people, those with sensitive skin or fragrance allergies may want to avoid it.
Quick decision guide
Useful, but context matters
Amylcinnamal Diethyl Acetal can be useful, but watch for some irritation potential.
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 Amylcinnamal 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 acetal derivative of amylcinnamal, created to provide a more stable and less reactive floral fragrance note in cosmetic formulations.
How it works
It functions purely as a fragrance ingredient, evaporating from the skin or hair to release a pleasant floral scent. It does not provide any skincare benefits like moisturizing or anti-aging.
Pros
Pleasant floral scent
Provides a consistent, long-lasting jasmine-like fragrance that many users find appealing.
Stable in formulations
As a synthetic acetal, it is more chemically stable than some natural fragrance oils, helping maintain scent integrity over time.
Cons and cautions
Potential allergen
Classified as a common allergen by the EU Cosmetics Regulation; must be listed separately on labels, and can cause contact dermatitis in sensitive individuals.
No skincare benefit
Adds only fragrance to a product, offering no moisturizing, soothing, or protective effects for the skin.
Best for
- People without fragrance sensitivities who enjoy floral-scented products
- Those looking for a stable synthetic alternative to natural jasmine oil
Use caution if
- Individuals with known fragrance allergies or sensitive skin
- Anyone avoiding synthetic fragrance ingredients in their routine
Usage tips
Safety summary
Generally safe for most people at low concentrations, but poses a moderate risk of skin sensitization. Individuals with fragrance allergies should avoid it.
Research notes
Research indicates that amylcinnamal and its derivatives can cause allergic contact dermatitis in susceptible individuals. The acetal form is considered less reactive but still carries sensitization potential.
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 and US, but must be listed on the ingredient label if present above certain thresholds due to its allergen potential.
- Common uses
- Fragranced lotions, Perfumes, Body washes, Hair products
- Environmental note
- As a synthetic compound, its environmental persistence and aquatic toxicity are not well-documented, but it is generally used in very small amounts.
Good to know
- This ingredient is derived from amylcinnamal, which is one of the 26 fragrance allergens that must be declared on cosmetic labels in the European Union.
- It is not the same as natural jasmine oil, which contains many different chemical compounds.
Common questions
What is Amylcinnamal Diethyl Acetal in beauty products?
Amylcinnamal Diethyl Acetal is a man-made chemical added to products to give them a sweet, floral smell similar to jasmine. It is a modified version of another fragrance ingredient called amylcinnamal, which is known to be a common allergen. Because of this, products containing it must list it separately on the label in many regions. While it is generally safe for most people, those with sensitive skin or fragrance allergies may want to avoid it.
What does Amylcinnamal Diethyl Acetal do in a beauty product?
It functions purely as a fragrance ingredient, evaporating from the skin or hair to release a pleasant floral scent. It does not provide any skincare benefits like moisturizing or anti-aging.
Is Amylcinnamal Diethyl Acetal safe for most people?
Generally safe for most people at low concentrations, but poses a moderate risk of skin sensitization. Individuals with fragrance allergies should avoid it.
Who should be careful with Amylcinnamal Diethyl Acetal?
Individuals with known fragrance allergies or sensitive skin Anyone avoiding synthetic fragrance ingredients in their 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.