Ingredient review
Trans-Trimethyldodecatetraenal
INCI: TRANS-TRIMETHYLDODECATETRAENAL
A synthetic fragrance ingredient that adds a fresh scent but offers no skincare benefits and may cause sensitivity in some individuals.
In plain English
Trans-Trimethyldodecatetraenal is a man-made chemical that smells like fresh citrus or green leaves. It is added to products like lotions and cleansers to make them smell pleasant. It does not moisturize, treat, or improve your skin in any way—it is purely for scent. Because it is a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially for people with sensitive skin.
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
Trans-Trimethyldodecatetraenal 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 Trans-Trimethyldodecatetraenal.
- 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
A synthetic organic compound belonging to the aldehyde family, used specifically as a fragrance ingredient in cosmetics and personal care products.
How it works
It works by evaporating from the skin's surface, releasing molecules that interact with olfactory receptors in the nose to produce a fresh, citrus-like scent. It has no known functional role in skincare beyond fragrance.
Pros
Pleasant fresh scent
Adds a light, citrusy aroma that can make your skincare routine feel more refreshing and enjoyable.
Low irritation risk for most
At typical low concentrations, it is unlikely to cause problems for people without fragrance sensitivities.
Cons and cautions
No skincare benefit
This ingredient does not hydrate, soothe, or protect your skin—it is purely for scent, so it adds no functional value.
Potential allergen
Like many fragrance ingredients, it can trigger allergic reactions or irritation in people with sensitive skin or fragrance allergies.
Best for
- People who enjoy scented skincare and have no history of fragrance allergies
- Those looking for a fresh, citrusy scent in their routine
Use caution if
- Individuals with sensitive skin or known fragrance allergies
- Anyone following a fragrance-free skincare routine
Usage tips
Safety summary
Trans-Trimethyldodecatetraenal is considered safe for use in cosmetics at typical low concentrations. However, like all fragrance ingredients, it has the potential to cause allergic contact dermatitis in sensitive individuals. Regulatory bodies require it to be listed when present above certain thresholds.
Research notes
Research on this specific compound is limited, but it belongs to a class of aldehydes that are well-studied as fragrance allergens. The EU Scientific Committee on Consumer Safety (SCCS) and other bodies have established safe use levels for similar fragrance aldehydes.
Common label clues
- Typical concentration
- Typically used at very low levels (under 0.1%) due to its strong scent.
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets, subject to concentration limits and labeling requirements for known allergens.
- Common uses
- Fragranced skincare, Body lotions, Cleansers, Perfumes
- Environmental note
- As a synthetic compound, its environmental impact depends on production methods and disposal; it is not known to be bioaccumulative.
Good to know
- This ingredient is often used in combination with other fragrance components to create a complex scent profile.
- Fragrance ingredients like this one are not required to be individually listed on labels in some regions—they may simply appear as 'fragrance' or 'parfum'.
Common questions
What is Trans-Trimethyldodecatetraenal in beauty products?
Trans-Trimethyldodecatetraenal is a man-made chemical that smells like fresh citrus or green leaves. It is added to products like lotions and cleansers to make them smell pleasant. It does not moisturize, treat, or improve your skin in any way—it is purely for scent. Because it is a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially for people with sensitive skin.
What does Trans-Trimethyldodecatetraenal do in a beauty product?
It works by evaporating from the skin's surface, releasing molecules that interact with olfactory receptors in the nose to produce a fresh, citrus-like scent. It has no known functional role in skincare beyond fragrance.
Is Trans-Trimethyldodecatetraenal safe for most people?
Trans-Trimethyldodecatetraenal is considered safe for use in cosmetics at typical low concentrations. However, like all fragrance ingredients, it has the potential to cause allergic contact dermatitis in sensitive individuals. Regulatory bodies require it to be listed when present above certain thresholds.
Who should be careful with Trans-Trimethyldodecatetraenal?
Individuals with sensitive skin or known fragrance allergies 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.