Ingredient review
Benzophenone-1
INCI: Benzophenone-1
Benzophenone-1 is an effective UV filter, but its potential for skin sensitization and environmental concerns make it a less preferred choice in modern formulations.
In plain English
Benzophenone-1 is a synthetic chemical that absorbs ultraviolet (UV) light, especially UVB and some UVA rays. It's added to sunscreens and other products to help protect your skin from sun damage and to prevent other ingredients from breaking down in light. However, it can sometimes cause skin irritation or allergic reactions, and there are concerns about its impact on the environment, particularly in waterways.
Quick decision guide
Read the cautions before using
Benzophenone-1 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Benzophenone-1.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
Benzophenone-1 (BP-1) is a synthetic organic compound belonging to the benzophenone family. It is a UV absorber that works by absorbing UV radiation and converting it into heat, which is then released from the skin. It is often used in combination with other UV filters to provide broad-spectrum protection.
How it works
When applied to the skin, Benzophenone-1 absorbs UV light energy and transforms it into a less harmful form of energy (heat). This prevents UV radiation from penetrating the skin and causing damage like sunburn, premature aging, and DNA damage. It also helps stabilize other ingredients in the product, preventing them from degrading when exposed to light.
Pros
Effective UV absorber
Benzophenone-1 effectively absorbs UVB and some UVA rays, helping to prevent sunburn and photoaging when used in adequate concentrations.
Product stabilizer
It helps prevent other ingredients, like fragrances and active compounds, from breaking down when exposed to sunlight, extending the product's shelf life.
Cons and cautions
Skin sensitization risk
Benzophenone-1 is a known contact allergen and can cause skin irritation, redness, or allergic reactions, especially in people with sensitive skin.
Environmental concerns
It is not readily biodegradable and has been found in water sources, where it may harm aquatic life. Some studies suggest it can act as an endocrine disruptor in fish.
Best for
- Individuals looking for a UV filter that also stabilizes other ingredients
- People using products in stable, well-formulated sunscreens where BP-1 is part of a broader UV protection system
Use caution if
- Those with sensitive or allergy-prone skin, as BP-1 can cause contact dermatitis
- Individuals concerned about environmental impact or systemic absorption
Usage tips
Safety summary
Benzophenone-1 is generally considered safe for use in cosmetics at regulated concentrations, but it carries a moderate risk of skin sensitization and irritation. There are also concerns about systemic absorption and environmental impact. It is not recommended for sensitive skin or for those seeking a more eco-friendly option.
Research notes
Research indicates that Benzophenone-1 can be absorbed through the skin and has been detected in human urine and breast milk. Animal studies suggest potential endocrine-disrupting effects, but human data is limited. It is a known contact allergen, with patch test studies showing positive reactions in some individuals.
Common label clues
- Typical concentration
- Up to 10% in rinse-off products; up to 6% in leave-on products (varies by region)
- Regulatory status
- Approved for use in sunscreens and cosmetics in many regions, including the EU and the US, but with concentration limits. The EU has stricter regulations, and some countries have banned or restricted certain benzophenones due to safety concerns.
- Common uses
- Sunscreens, Moisturizers, Lip products, Hair care, Nail polish
- Environmental note
- Benzophenone-1 is considered persistent in the environment and has been detected in wastewater and surface water. It can accumulate in aquatic organisms and may have endocrine-disrupting effects on fish and other wildlife.
Good to know
- Benzophenone-1 is less commonly used in modern sunscreens compared to newer, more photostable UV filters.
- It is often listed under the INCI name 'Benzophenone-1' on product labels.
Common questions
What is Benzophenone-1 in beauty products?
Benzophenone-1 is a synthetic chemical that absorbs ultraviolet (UV) light, especially UVB and some UVA rays. It's added to sunscreens and other products to help protect your skin from sun damage and to prevent other ingredients from breaking down in light. However, it can sometimes cause skin irritation or allergic reactions, and there are concerns about its impact on the environment, particularly in waterways.
What does Benzophenone-1 do in a beauty product?
When applied to the skin, Benzophenone-1 absorbs UV light energy and transforms it into a less harmful form of energy (heat). This prevents UV radiation from penetrating the skin and causing damage like sunburn, premature aging, and DNA damage. It also helps stabilize other ingredients in the product, preventing them from degrading when exposed to light.
Is Benzophenone-1 safe for most people?
Benzophenone-1 is generally considered safe for use in cosmetics at regulated concentrations, but it carries a moderate risk of skin sensitization and irritation. There are also concerns about systemic absorption and environmental impact. It is not recommended for sensitive skin or for those seeking a more eco-friendly option.
Who should be careful with Benzophenone-1?
Those with sensitive or allergy-prone skin, as BP-1 can cause contact dermatitis Individuals concerned about environmental impact or systemic absorption
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.