Ingredient review

Benzotriazolyl Hydroxyphenethyl Methacrylate

INCI: BENZOTRIAZOLYL HYDROXYPHENETHYL METHACRYLATE

A synthetic UV filter that helps protect skin from sun damage, generally considered safe and non-irritating.

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In plain English

This is a man-made ingredient that absorbs ultraviolet (UV) light from the sun, especially UVA rays, to prevent them from damaging your skin. It's often used in sunscreens and daily moisturizers with SPF. Think of it as a tiny sponge that soaks up harmful UV energy before it can reach your skin cells.

Quick decision guide

Useful, but context matters

Benzotriazolyl Hydroxyphenethyl Methacrylate 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 Benzotriazolyl Hydroxyphenethyl Methacrylate.
  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 polymer derived from benzotriazole, designed to absorb UV radiation and convert it into harmless heat. It is often used as a UV filter in sunscreens and other skincare products.

How it works

When applied to the skin, it forms a thin film that absorbs UV light (particularly UVA rays) and dissipates the energy as heat, preventing it from penetrating deeper layers of the skin and causing damage like sunburn, premature aging, or DNA harm.

Pros

Effective UVA protection

Absorbs UVA rays that cause premature aging and skin cancer, offering reliable broad-spectrum defense.

Good photostability

Does not break down quickly in sunlight, so your sunscreen stays effective longer without needing frequent reapplication.

Cons and cautions

Potential white cast

On darker skin tones, it may leave a slight whitish residue, though less than mineral filters like zinc oxide.

Synthetic origin

As a lab-made ingredient, it may not be preferred by those seeking natural or 'clean' formulations.

Best for

  • Anyone seeking daily UVA protection
  • People with sensitive skin who tolerate chemical sunscreens well

Use caution if

  • Those preferring mineral-only sunscreens
  • Individuals with known allergy to benzotriazole compounds (rare)

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 for topical use in sunscreens at concentrations up to 10%. Rare reports of skin irritation or allergy exist, but it is well-tolerated by most skin types.

Research notes

Research shows effective UVA absorption and good photostability. Human safety studies indicate low irritation and sensitization potential. More long-term environmental impact data is needed.

Common label clues

Typical concentration
1–10% in sunscreen formulations
Regulatory status
Approved as a UV filter in the European Union and many other regions; not currently approved by the US FDA for over-the-counter sunscreens.
Common uses
Sunscreens, Anti-aging creams, Moisturizers with SPF
Environmental note
Some studies suggest benzotriazole compounds may persist in the environment, but current data is limited and not conclusive for this specific ingredient.

Good to know

  • Often combined with other UV filters like avobenzone or octocrylene for enhanced protection.
  • Approved for use in sunscreens in many countries, including the EU and Asia, but not yet in the US as of 2025.

Common questions

What is Benzotriazolyl Hydroxyphenethyl Methacrylate in beauty products?

This is a man-made ingredient that absorbs ultraviolet (UV) light from the sun, especially UVA rays, to prevent them from damaging your skin. It's often used in sunscreens and daily moisturizers with SPF. Think of it as a tiny sponge that soaks up harmful UV energy before it can reach your skin cells.

What does Benzotriazolyl Hydroxyphenethyl Methacrylate do in a beauty product?

When applied to the skin, it forms a thin film that absorbs UV light (particularly UVA rays) and dissipates the energy as heat, preventing it from penetrating deeper layers of the skin and causing damage like sunburn, premature aging, or DNA harm.

Is Benzotriazolyl Hydroxyphenethyl Methacrylate safe for most people?

Generally recognized as safe for topical use in sunscreens at concentrations up to 10%. Rare reports of skin irritation or allergy exist, but it is well-tolerated by most skin types.

Who should be careful with Benzotriazolyl Hydroxyphenethyl Methacrylate?

Those preferring mineral-only sunscreens Individuals with known allergy to benzotriazole compounds (rare)

Research sources

European Chemicals Agency (ECHA) – Benzotriazolyl Hydroxyphenethyl MethacrylateOpenPubMed – Safety assessment of benzotriazole UV filtersOpenCosIng – EU Cosmetic Ingredient DatabaseOpen

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.