Benzophenone-4 is a water-soluble benzophenone-class UV filter that absorbs UVB and short UVA radiation, used in sunscreens and as a photostabilizer to protect formulations from light-induced degradation. It is typically incorporated at low concentrations as part of a broader UV protection system.
| Reported effect | How often | Notes |
|---|---|---|
Contact dermatitis / skin irritation | Uncommon | Localized redness or itching reported in sensitive individuals. |
Allergic contact dermatitis | Rare | Benzophenones are recognized contact allergens, though sensitization rates are low. |
Photoallergic reaction | Rare | Reactions triggered or worsened by sun exposure documented in patch-test studies. |
Stinging on application near eyes | Uncommon | Possible transient discomfort with mucosal contact. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.