Ingredient review

Benzophenone-5

INCI: BENZOPHENONE-5

Benzophenone-5 is a synthetic UV filter that helps protect skin from sun damage, but it has raised some safety concerns regarding skin sensitivity and potential hormone disruption.

beautyskincareuv-filter

In plain English

Benzophenone-5 is a man-made chemical that absorbs ultraviolet (UV) light, especially UVA and UVB rays. It's added to sunscreens and other skincare products to help prevent sunburn and skin damage. Think of it as a tiny sponge that soaks up UV energy before it can harm your skin. However, like some other chemical sunscreens, it can cause irritation for sensitive skin and has been studied for possible hormone-like effects, though the evidence is not conclusive.

Quick decision guide

Useful, but context matters

Benzophenone-5 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Benzophenone-5.
  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

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

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

Benzophenone-5 is a synthetic organic compound belonging to the benzophenone family. It is a derivative of benzophenone-4 (sulisobenzone) and functions as a UV absorber. It is often used in combination with other UV filters to provide broad-spectrum protection.

How it works

When applied to the skin, Benzophenone-5 absorbs UV radiation and converts it into heat, which is then released from the skin. This prevents the UV rays from penetrating deeper and causing cellular damage, such as DNA mutations or premature aging.

Pros

Effective UV Protection

Benzophenone-5 absorbs both UVA and UVB rays, helping to prevent sunburn and long-term skin damage like premature aging.

Product Stability

It can help stabilize other sunscreen ingredients, extending the shelf life and effectiveness of the product.

Cons and cautions

Skin Irritation Risk

For people with sensitive skin, Benzophenone-5 can cause redness, stinging, or allergic reactions, making it less suitable for daily use on reactive skin.

Environmental Concerns

Like many chemical sunscreens, Benzophenone-5 may accumulate in waterways and has been linked to coral reef bleaching in some studies, raising ecological concerns.

Best for

  • People looking for a chemical sunscreen that offers broad-spectrum protection
  • Those who prefer lightweight, non-whitening sunscreens

Use caution if

  • Individuals with sensitive or reactive skin, as it may cause irritation
  • Pregnant or breastfeeding women who want to minimize exposure to chemical UV filters (consult a doctor)

Usage tips

Apply sunscreen with Benzophenone-5 15 minutes before sun exposure for best protection.
Reapply every two hours, or after swimming or sweating, to maintain effectiveness.
If you have sensitive skin, do a patch test on a small area before full application.

Safety summary

Benzophenone-5 is generally considered safe for topical use at approved concentrations, but it can cause skin irritation in sensitive individuals. Animal studies suggest potential endocrine disruption at high doses, but human relevance is unclear. Regulatory bodies continue to monitor its safety.

Research notes

Research shows Benzophenone-5 effectively absorbs UV radiation. Some studies indicate it may be absorbed through the skin and has estrogenic activity in lab tests, but human studies are limited. Environmental studies highlight its persistence and potential harm to aquatic life.

Common label clues

Typical concentration
Up to 10% in sunscreens (varies by region)
Regulatory status
Approved for use in sunscreens in the US (FDA) and EU (up to 10% concentration), but subject to ongoing safety reviews. Not all benzophenones are approved in all countries.
Common uses
Sunscreens, Moisturizers, Lip balms, Hair care products
Environmental note
Benzophenone-5 has been detected in water sources and may contribute to coral bleaching. Some regions restrict its use to protect marine ecosystems.

Good to know

  • Benzophenone-5 is sometimes listed as Sulisobenzone on ingredient labels.
  • It is often used in combination with other UV filters like avobenzone or octinoxate for broader protection.
  • Some regions, like Hawaii, have banned certain benzophenones due to environmental concerns, but Benzophenone-5 is not always included in these bans.

Common questions

What is Benzophenone-5 in beauty products?

Benzophenone-5 is a man-made chemical that absorbs ultraviolet (UV) light, especially UVA and UVB rays. It's added to sunscreens and other skincare products to help prevent sunburn and skin damage. Think of it as a tiny sponge that soaks up UV energy before it can harm your skin. However, like some other chemical sunscreens, it can cause irritation for sensitive skin and has been studied for possible hormone-like effects, though the evidence is not conclusive.

What does Benzophenone-5 do in a beauty product?

When applied to the skin, Benzophenone-5 absorbs UV radiation and converts it into heat, which is then released from the skin. This prevents the UV rays from penetrating deeper and causing cellular damage, such as DNA mutations or premature aging.

Is Benzophenone-5 safe for most people?

Benzophenone-5 is generally considered safe for topical use at approved concentrations, but it can cause skin irritation in sensitive individuals. Animal studies suggest potential endocrine disruption at high doses, but human relevance is unclear. Regulatory bodies continue to monitor its safety.

Who should be careful with Benzophenone-5?

Individuals with sensitive or reactive skin, as it may cause irritation Pregnant or breastfeeding women who want to minimize exposure to chemical UV filters (consult a doctor)

Research sources

FDA Sunscreen MonographOpenEnvironmental Working Group (EWG) - Benzophenone-5OpenPubMed - Endocrine effects of benzophenonesOpen

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.