Science
Mechanism of Action
Benzophenone-11 operates by intercepting ultraviolet radiation, specifically UVA and short-wave UVB rays. It absorbs this energy and converts it into low-level, harmless thermal energy (heat), thereby preventing the photodegradation of the formulation and providing secondary protection to the skin's surface.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Clinical patch testing at a 10% concentration demonstrated that Benzophenone-11 is non-sensitizing and non-irritating to human skin.
- 02 Human repeat insult patch tests (HRIPT) conducted at 20% concentration confirmed the ingredient's safety profile as a non-sensitizer.
Transparency
Dusting Analysis
Benzophenone-11 is typically used at functional concentrations to ensure formula stability. It is rarely 'dusted' because its primary value is technical; however, if used below 0.1%, its efficacy as a light stabilizer may be compromised.
The Formula
Formulation
Stability
This ingredient is exceptionally photostable and does not break down upon UV exposure. It is often used to rescue the stability of more fragile UV filters.
Synergies
- Avobenzone (provides critical stabilization)
Conflicts
- Strong oxidizing agents
- Highly alkaline environments (above pH 8.0 may cause color shifts)
Safety
Safety Profile
Reaffirmed safe by the CIR Expert Panel in 2021. While it is a potent UV absorber, it is categorized as a light stabilizer in the US rather than an active sunscreen ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A high-performance stabilizer that preserves the integrity of active skincare formulations against light-induced loss of potency.
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References
Sources