Ingredient review

Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone

INCI: ACETOXYTETRAMETHYLBUTYLPHENYL TETRAMETHYLBUTYLBENZOFURANONE

A synthetic UV filter that helps protect skin from sun damage, but its long-term safety data is still emerging.

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In plain English

This is a man-made ingredient added to sunscreens and some moisturizers to absorb UV rays and prevent them from damaging your skin. It works by converting UV light into heat, which is then released from the skin. While it is considered safe at approved levels, it is a newer ingredient, so ongoing research continues to monitor its effects.

Quick decision guide

Useful, but context matters

Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic organic compound designed to absorb ultraviolet (UV) radiation, specifically UVA and UVB rays, to protect the skin from sun damage.

How it works

It absorbs UV photons and converts them into harmless heat energy, which is then dissipated from the skin. This prevents UV rays from penetrating deeper and causing cellular damage, sunburn, or premature aging.

Pros

Effective UV Protection

Provides reliable protection against both UVA and UVB rays, helping prevent sunburn and long-term skin damage.

Formulation Stability

Helps stabilize other sunscreen ingredients, extending the product's shelf life and effectiveness under sunlight.

Cons and cautions

Limited Long-Term Data

As a newer ingredient, comprehensive long-term human studies on systemic absorption and environmental impact are still being conducted.

Potential Irritation

While rare, some individuals with very sensitive skin may experience mild irritation or allergic reactions.

Best for

  • People looking for broad-spectrum sun protection
  • Those with normal to oily skin who prefer lightweight sunscreens

Use caution if

  • Individuals with known sensitivity to synthetic UV filters
  • Those seeking purely mineral-based sun protection

Usage tips

Apply sunscreen containing this ingredient generously 15 minutes before sun exposure.
Reapply every two hours, or after swimming or sweating, for continued protection.

Safety summary

Generally recognized as safe when used as directed in cosmetic products. Skin irritation is rare, and it does not appear to be comedogenic. Long-term systemic effects are still being researched.

Research notes

Studies show effective UV absorption and photostability. Human safety data is moderate, with ongoing research into potential endocrine effects and environmental persistence.

Common label clues

Typical concentration
Up to 10% in leave-on products
Regulatory status
Approved for use in sunscreens in many regions, including the EU and Asia, with concentration limits typically up to 10%. In the US, it is not yet FDA-approved for over-the-counter sunscreen use.
Common uses
Sunscreens, Moisturizers with SPF, Anti-aging products
Environmental note
Some synthetic UV filters have been detected in aquatic environments; however, this specific compound's environmental impact is still under study.

Good to know

  • This ingredient is often combined with other UV filters to achieve broad-spectrum protection.
  • It is not a physical blocker like zinc oxide, so it may feel lighter on the skin.

Common questions

What is Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone in beauty products?

This is a man-made ingredient added to sunscreens and some moisturizers to absorb UV rays and prevent them from damaging your skin. It works by converting UV light into heat, which is then released from the skin. While it is considered safe at approved levels, it is a newer ingredient, so ongoing research continues to monitor its effects.

What does Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone do in a beauty product?

It absorbs UV photons and converts them into harmless heat energy, which is then dissipated from the skin. This prevents UV rays from penetrating deeper and causing cellular damage, sunburn, or premature aging.

Is Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone safe for most people?

Generally recognized as safe when used as directed in cosmetic products. Skin irritation is rare, and it does not appear to be comedogenic. Long-term systemic effects are still being researched.

Who should be careful with Acetoxytetramethylbutylphenyl Tetramethylbutylbenzofuranone?

Individuals with known sensitivity to synthetic UV filters Those seeking purely mineral-based sun protection

Research sources

PubChem - Acetoxytetramethylbutylphenyl TetramethylbutylbenzofuranoneOpenEuropean Chemicals Agency (ECHA) - Substance InformationOpen

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.