Ingredient review
Cinnamyl Butyrate
INCI: CINNAMYL BUTYRATE
Cinnamyl Butyrate is a synthetic fragrance ingredient that adds a sweet, balsamic scent but may cause skin irritation in sensitive individuals.
In plain English
Cinnamyl Butyrate is a man-made chemical that smells sweet and a bit like cinnamon or balsam. It's added to products like lotions and perfumes to give them a pleasant scent. Because it's a fragrance ingredient, it can sometimes irritate sensitive skin or cause allergic reactions, especially if you're prone to fragrance sensitivities.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Cinnamyl Butyrate 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 Cinnamyl Butyrate.
- 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
Cinnamyl Butyrate is a synthetic ester formed from cinnamyl alcohol and butyric acid. It is used exclusively as a fragrance ingredient in cosmetics and personal care products.
How it works
In a cosmetic product, Cinnamyl Butyrate functions solely as a fragrance component. It does not provide any skincare benefits like moisturizing or anti-aging; its only role is to impart a sweet, balsamic, cinnamon-like scent to the product.
Pros
Pleasant scent
Adds a sweet, warm, balsamic aroma that many people find appealing in lotions, perfumes, and body washes.
Low comedogenic risk
Unlikely to clog pores, making it generally safe for acne-prone skin as long as no irritation occurs.
Cons and cautions
Potential skin irritant
Can cause redness, itching, or stinging, especially on sensitive or compromised skin. Patch testing is recommended.
Common allergen
Listed as a potential allergen by the EU Cosmetics Regulation; people with fragrance allergies may react to it even at low concentrations.
Best for
- People who enjoy scented products and have no history of fragrance allergies
- Those looking for a sweet, warm scent in their skincare or body care
Use caution if
- Individuals with known fragrance allergies or sensitive, reactive skin
- Anyone following a fragrance-free skincare routine
Usage tips
Safety summary
Cinnamyl Butyrate is considered safe for use in cosmetics at typical low concentrations, but it is a known skin sensitizer and allergen. Individuals with fragrance sensitivities should avoid it. The EU mandates labeling as an allergen, reflecting its moderate risk profile.
Research notes
Research indicates that Cinnamyl Butyrate can cause allergic contact dermatitis in sensitized individuals. It is included in the EU's list of 26 known fragrance allergens. No significant toxicity or carcinogenicity has been reported at cosmetic use levels.
Common label clues
- Typical concentration
- Typically used at very low concentrations (under 1%) due to its strong scent and potential for skin sensitization.
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng). The EU requires it to be labeled as a potential allergen when present above 0.001% in leave-on products and 0.01% in rinse-off products.
- Common uses
- Fragranced lotions, Perfumes, Body washes, Hair care
- Environmental note
- As a synthetic compound, its environmental impact depends on production methods and disposal. It is not known to be persistent or bioaccumulative, but limited data is available.
Good to know
- Cinnamyl Butyrate is often listed simply as 'fragrance' or 'parfum' on ingredient labels, so it may not appear by name.
- The EU requires Cinnamyl Butyrate to be listed individually on the label if present above certain concentrations due to its allergen potential.
Common questions
What is Cinnamyl Butyrate in beauty products?
Cinnamyl Butyrate is a man-made chemical that smells sweet and a bit like cinnamon or balsam. It's added to products like lotions and perfumes to give them a pleasant scent. Because it's a fragrance ingredient, it can sometimes irritate sensitive skin or cause allergic reactions, especially if you're prone to fragrance sensitivities.
What does Cinnamyl Butyrate do in a beauty product?
In a cosmetic product, Cinnamyl Butyrate functions solely as a fragrance component. It does not provide any skincare benefits like moisturizing or anti-aging; its only role is to impart a sweet, balsamic, cinnamon-like scent to the product.
Is Cinnamyl Butyrate safe for most people?
Cinnamyl Butyrate is considered safe for use in cosmetics at typical low concentrations, but it is a known skin sensitizer and allergen. Individuals with fragrance sensitivities should avoid it. The EU mandates labeling as an allergen, reflecting its moderate risk profile.
Who should be careful with Cinnamyl Butyrate?
Individuals with known fragrance allergies or sensitive, reactive skin Anyone following a fragrance-free skincare 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.