Ingredient review
Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate
INCI: PENTAERYTHRITYL TETRAETHYLHEXANOATE/TETRAMETHOXYCINNAMATE
A dual-action ingredient that softens skin while helping to absorb UV rays, but its sun protection role is limited and usually paired with other filters.
In plain English
This ingredient is a hybrid molecule: one part is an emollient ester that makes skin feel smooth and soft, and the other part is a UV-absorbing compound that helps protect skin from the sun. It is not a standalone sunscreen but works well with other sun filters to improve texture and boost SPF.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate 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 Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate.
- 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 semi-synthetic ester derived from pentaerythritol and fatty acids, chemically bonded to a UV-filter molecule (tetramethoxycinnamate). It is used in cosmetics to provide both moisturizing and light-absorbing properties.
How it works
The ester portion sits on the skin's surface, reducing water loss and giving a silky feel. The cinnamate portion absorbs UVB rays (280–315 nm) and converts them into harmless heat, adding to the product's sun protection factor.
Pros
Dual function
Combines emollient and UV-absorbing properties, reducing the need for multiple ingredients and improving product texture.
Skin feel
Leaves a silky, non-sticky finish that makes sunscreens more pleasant to wear daily.
Cons and cautions
Not a standalone sunscreen
Its UV protection is limited to UVB and is weaker than dedicated filters, so it must be used with other active ingredients for adequate protection.
Semi-synthetic origin
May be less appealing to consumers seeking fully natural or plant-derived ingredients.
Best for
- People looking for a lightweight, non-greasy sunscreen or moisturizer
- Those with normal to dry skin who want added emollience in their SPF product
Use caution if
- Individuals with known sensitivity to cinnamate-based UV filters
Usage tips
Safety summary
Generally recognized as safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk. As with any UV filter, avoid contact with eyes and broken skin.
Research notes
Limited peer-reviewed studies specific to this hybrid molecule. Its UV-absorbing properties are inferred from the known behavior of cinnamate esters. More research is needed on its long-term safety and environmental fate.
Common label clues
- Typical concentration
- 1–10% depending on formulation
- Regulatory status
- Approved for use in cosmetics in the EU, USA, and many other regions, subject to concentration limits. Not classified as a primary sunscreen active by the FDA.
- Common uses
- Sunscreens, Moisturizers, BB creams, Foundations
- Environmental note
- Cinnamate derivatives have been studied for potential environmental impact on coral reefs, but this specific hybrid form is less commonly assessed. Check product labeling for reef-safe claims.
Good to know
- This ingredient is often listed near the middle or end of an INCI list, indicating it is not the primary UV filter
- It is not a common standalone ingredient; you will mostly find it in combination sunscreen formulas
Common questions
What is Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate in beauty products?
This ingredient is a hybrid molecule: one part is an emollient ester that makes skin feel smooth and soft, and the other part is a UV-absorbing compound that helps protect skin from the sun. It is not a standalone sunscreen but works well with other sun filters to improve texture and boost SPF.
What does Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate do in a beauty product?
The ester portion sits on the skin's surface, reducing water loss and giving a silky feel. The cinnamate portion absorbs UVB rays (280–315 nm) and converts them into harmless heat, adding to the product's sun protection factor.
Is Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate safe for most people?
Generally recognized as safe for topical use in cosmetics at typical concentrations. Low irritation and comedogenic risk. As with any UV filter, avoid contact with eyes and broken skin.
Who should be careful with Pentaerythrityl Tetraethylhexanoate/Tetramethoxycinnamate?
Individuals with known sensitivity to cinnamate-based UV filters
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.