Ingredient review
Ethylphenylbutyraldehyde
INCI: AR-ETHYLPHENYLBUTYRALDEHYDE
A synthetic fragrance aldehyde that adds a pleasant floral note but may cause skin sensitivity in some people.
In plain English
This is a man-made chemical that smells floral and sweet, similar to hyacinth or lilac. It's added to products to make them smell nice, but like many fragrance ingredients, it can sometimes irritate sensitive skin or cause allergic reactions. It's not a moisturizer or active skincare ingredient—it's purely for scent.
Quick decision guide
Useful, but context matters
Ethylphenylbutyraldehyde 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 Ethylphenylbutyraldehyde.
- 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 aromatic aldehyde used as a fragrance ingredient in cosmetics and personal care products. It belongs to a family of compounds known for their floral, green, and slightly sweet scent profiles.
How it works
It evaporates from the skin or hair after application, releasing scent molecules that are detected by the nose. It does not provide any functional skincare benefit like hydration or protection; its sole purpose is to impart a pleasant fragrance.
Pros
Pleasant floral scent
Adds a delicate, sweet floral note that many people find appealing in perfumes and lotions.
Low comedogenic risk
Unlikely to clog pores, making it suitable for non-acne-prone skin when used in low concentrations.
Cons and cautions
Potential skin irritant
Can cause redness, itching, or stinging in people with sensitive skin or fragrance allergies.
No skincare benefit
Provides only scent, no moisturizing, anti-aging, or protective effects for the skin.
Best for
- People who enjoy scented products and have no history of fragrance allergies
- Those looking for a floral scent in their routine
Use caution if
- Individuals with sensitive, reactive, or eczema-prone skin
- Anyone with a known allergy to fragrance or aldehydes
Usage tips
Safety summary
Generally considered safe for most people at the low concentrations used in cosmetics, but it is a known skin sensitizer and should be avoided by those with fragrance allergies.
Research notes
Research indicates that synthetic aldehydes can cause allergic contact dermatitis in susceptible individuals. Regulatory bodies like the EU require labeling of certain fragrance allergens, including some aldehydes, to help consumers identify potential irritants.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1%
- Regulatory status
- Approved for use in cosmetics in the EU and US, but must be listed on the label if present above certain thresholds due to allergen labeling requirements.
- Common uses
- Perfumes, Fragranced skincare, Body lotions, Hair products
- Environmental note
- As a synthetic compound, it is not biodegradable and may accumulate in the environment, though concentrations in rinse-off products are low.
Good to know
- This ingredient is often listed simply as 'fragrance' or 'parfum' on labels, so it may not appear by name.
- Aldehydes like this one are common in floral and citrus perfumes but are also known allergens for some people.
Common questions
What is Ethylphenylbutyraldehyde in beauty products?
This is a man-made chemical that smells floral and sweet, similar to hyacinth or lilac. It's added to products to make them smell nice, but like many fragrance ingredients, it can sometimes irritate sensitive skin or cause allergic reactions. It's not a moisturizer or active skincare ingredient—it's purely for scent.
What does Ethylphenylbutyraldehyde do in a beauty product?
It evaporates from the skin or hair after application, releasing scent molecules that are detected by the nose. It does not provide any functional skincare benefit like hydration or protection; its sole purpose is to impart a pleasant fragrance.
Is Ethylphenylbutyraldehyde safe for most people?
Generally considered safe for most people at the low concentrations used in cosmetics, but it is a known skin sensitizer and should be avoided by those with fragrance allergies.
Who should be careful with Ethylphenylbutyraldehyde?
Individuals with sensitive, reactive, or eczema-prone skin Anyone with a known allergy to fragrance or aldehydes
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.