Ingredient review
Isoamyl Cinnamate
INCI: Isoamyl Cinnamate
Isoamyl Cinnamate is a synthetic fragrance compound that adds a warm, cinnamic scent to products, but it may be a potential skin sensitizer for some individuals.
In plain English
Isoamyl Cinnamate is a man-made ingredient that smells like cinnamon or balsam. It's added to lotions, perfumes, and washes to give them a pleasant, sweet-spicy scent. While generally considered safe at low levels, it can sometimes cause allergic reactions or skin irritation in 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
Isoamyl Cinnamate 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 Isoamyl Cinnamate.
- 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
Isoamyl Cinnamate is a synthetic ester derived from cinnamic acid and isoamyl alcohol. It is used primarily as a fragrance ingredient to impart a sweet, balsamic, cinnamon-like aroma. It is not a natural extract but a chemically produced compound.
How it works
In a cosmetic product, Isoamyl Cinnamate acts as a fragrance ingredient by evaporating from the skin and releasing its scent molecules into the air. It may also function as a masking agent to cover the odor of other raw materials. It does not provide any skin benefit beyond scent.
Pros
Pleasant scent profile
Adds a warm, sweet, balsamic aroma that is popular in many scented products, enhancing the user experience.
Low irritation for most
At typical low concentrations, it is generally well-tolerated by most skin types without causing irritation.
Cons and cautions
Potential allergen
Isoamyl Cinnamate is a known fragrance allergen and may cause contact dermatitis or allergic reactions in sensitive individuals.
No skin benefit
This ingredient serves only as a fragrance or masking agent and does not moisturize, protect, or improve skin health.
Best for
- People who enjoy scented products and do not have fragrance sensitivities
- Those looking for a warm, spicy scent in their skincare or body care
Use caution if
- Individuals with known fragrance allergies or sensitive, reactive skin
Usage tips
Safety summary
Isoamyl Cinnamate is considered safe for most people at the low concentrations used in cosmetics. However, it is a recognized fragrance allergen, and individuals with fragrance sensitivities should avoid it. Regulatory bodies require labeling to help consumers identify its presence.
Research notes
Research confirms that Isoamyl Cinnamate can act as a skin sensitizer in susceptible individuals. It is included in the EU's list of fragrance allergens based on clinical evidence of contact allergy. No significant toxicity or carcinogenicity has been reported at cosmetic use levels.
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. In the EU, it must be listed on the label if its concentration exceeds 0.001% in leave-on products or 0.01% in rinse-off products due to its allergen status.
- Common uses
- Fragranced lotions, Perfumes, Body washes, Scented creams
- Environmental note
- As a synthetic compound, its environmental persistence is low, but it may contribute to fragrance-related pollution in waterways. Natural alternatives may have a different environmental footprint.
Good to know
- Isoamyl Cinnamate is listed as one of the 26 fragrance allergens that must be labeled separately in the EU when present above certain levels.
- It is often found in combination with other cinnamate derivatives in perfume blends.
Common questions
What is Isoamyl Cinnamate in beauty products?
Isoamyl Cinnamate is a man-made ingredient that smells like cinnamon or balsam. It's added to lotions, perfumes, and washes to give them a pleasant, sweet-spicy scent. While generally considered safe at low levels, it can sometimes cause allergic reactions or skin irritation in people with sensitive skin or fragrance allergies.
What does Isoamyl Cinnamate do in a beauty product?
In a cosmetic product, Isoamyl Cinnamate acts as a fragrance ingredient by evaporating from the skin and releasing its scent molecules into the air. It may also function as a masking agent to cover the odor of other raw materials. It does not provide any skin benefit beyond scent.
Is Isoamyl Cinnamate safe for most people?
Isoamyl Cinnamate is considered safe for most people at the low concentrations used in cosmetics. However, it is a recognized fragrance allergen, and individuals with fragrance sensitivities should avoid it. Regulatory bodies require labeling to help consumers identify its presence.
Who should be careful with Isoamyl Cinnamate?
Individuals with known fragrance allergies or sensitive, reactive skin
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.