Science
Mechanism of Action
It acts as a chemical screen by absorbing and dispersing UV energy, specifically targeting the UVB and shorter UVA spectrums (peaking at 287 nm and 325 nm). This process converts harmful radiation into negligible heat, preventing cellular damage and inhibiting the photodegradation of other active ingredients in the product.
Research
Clinical Evidence
Medium confidence2%
Key findings
- 01 Observed instances of photoallergic reactions in 20% of test subjects with existing eczematous conditions during photopatch testing.
- 02 Long-term clinical data identified this ingredient as a causal factor in rare cases of allergic contact dermatitis (13 cases out of 23,908 patients).
Transparency
Dusting Analysis
Benzophenone-10 is typically used at functional concentrations to ensure UV stability; however, it is sometimes included at very low levels (under 0.1%) simply as a product color-protector rather than a therapeutic skin active.
The Formula
Formulation
Stability
Exhibits robust photostability across a wide pH range but is susceptible to degradation in highly alkaline conditions (pH >12) or when exposed to intense thermal stress.
Synergies
- Antioxidants
- Photolabile actives
Conflicts
- Strong oxidizing agents
- Strong acids
- Strong bases
Safety
Safety Profile
Restricted to 4% in the EU for UV filtration. While CIR confirmed safety in 2021, emerging research suggests it may interact with inflammatory receptors (RORγt), warranting caution for reactive skin types.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An effective photostabilizer for protecting formulas, though its potential for sensitization makes it less ideal for reactive or sensitive skin profiles.
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