Benzophenone-4 (sulisobenzone) is a water-soluble organic UV filter that absorbs UVB and short UVA radiation, helping protect skin and formulations from sun-induced damage. It is also used to prevent UV degradation of product ingredients and color.
| Reported effect | How often | Notes |
|---|---|---|
| Contact dermatitis / skin irritation | Uncommon | Benzophenones are recognized sensitizers; localized redness or itching can occur. |
| Allergic contact dermatitis | Rare | True allergic reactions confirmed by patch testing are documented but infrequent. |
| Photoallergic or photocontact reactions | Rare | Reactions triggered or worsened by sun exposure have been reported for benzophenone filters. |
| Eye stinging or irritation | Uncommon | May cause discomfort if the product migrates into the eyes. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.