Ingredient review
Ethyl Dimethylhydrocinnamal
INCI: ETHYL 2,2-DIMETHYLHYDROCINNAMAL
A synthetic fragrance ingredient that adds a pleasant scent but may cause irritation in sensitive individuals.
In plain English
Ethyl dimethylhydrocinnamal is a man-made chemical that gives products a floral, citrusy, or sweet scent. It is commonly found in perfumes, lotions, and cleansers. While it makes products smell nice, it can be irritating to some people, especially those with sensitive skin or allergies. It is one of many fragrance ingredients that are required to be listed on labels in the EU due to potential allergenicity.
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
Ethyl Dimethylhydrocinnamal 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 Ethyl Dimethylhydrocinnamal.
- 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 is chemically related to cinnamaldehyde, a compound found in cinnamon oil.
How it works
It functions solely as a fragrance ingredient, providing a pleasant scent to the product. It does not have any active skincare benefits like moisturizing or exfoliating.
Pros
Pleasant scent
Adds a fresh, floral, or citrusy fragrance that enhances the sensory experience of using a product.
Widely used and stable
It is a stable synthetic ingredient that maintains its scent profile over time, making it reliable for manufacturers.
Cons and cautions
Potential irritant
Can cause redness, itching, or stinging in people with sensitive skin or fragrance allergies.
No skincare benefit
Provides only fragrance and does not contribute to moisturizing, anti-aging, or other skin health functions.
Best for
- People who enjoy scented skincare and do not have fragrance sensitivities
- Those using products where scent is a key part of the experience
Use caution if
- Individuals with sensitive, reactive, or eczema-prone skin
- Anyone with a known allergy to fragrance or cinnamal-related compounds
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 can cause allergic reactions in susceptible individuals. Regulatory bodies require labeling to help consumers avoid it if needed.
Research notes
Research confirms that ethyl dimethylhydrocinnamal is a common fragrance allergen, with patch test studies showing positive reactions in a small percentage of the population. It is included in the EU's list of 26 known fragrance allergens that must be labeled.
Common label clues
- Typical concentration
- Typically used at very low concentrations (under 1%) in rinse-off and leave-on products
- Regulatory status
- Approved for use in cosmetics in the US and EU, but must be listed on the label in the EU if it exceeds 0.01% in leave-on products or 0.001% in rinse-off products due to allergen labeling requirements.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, it is not biodegradable and may accumulate in the environment, though it is used in very small amounts.
Good to know
- In the EU, this ingredient must be listed on the label if present above a certain concentration due to its allergenic potential.
- It is often part of a 'fragrance' or 'parfum' blend, so it may not always be listed individually on non-EU labels.
Common questions
What is Ethyl Dimethylhydrocinnamal in beauty products?
Ethyl dimethylhydrocinnamal is a man-made chemical that gives products a floral, citrusy, or sweet scent. It is commonly found in perfumes, lotions, and cleansers. While it makes products smell nice, it can be irritating to some people, especially those with sensitive skin or allergies. It is one of many fragrance ingredients that are required to be listed on labels in the EU due to potential allergenicity.
What does Ethyl Dimethylhydrocinnamal do in a beauty product?
It functions solely as a fragrance ingredient, providing a pleasant scent to the product. It does not have any active skincare benefits like moisturizing or exfoliating.
Is Ethyl Dimethylhydrocinnamal 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 can cause allergic reactions in susceptible individuals. Regulatory bodies require labeling to help consumers avoid it if needed.
Who should be careful with Ethyl Dimethylhydrocinnamal?
Individuals with sensitive, reactive, or eczema-prone skin Anyone with a known allergy to fragrance or cinnamal-related compounds
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.