Science
Mechanism of Action
It acts as a chemical UV absorber that targets the UVB spectrum (290–320 nm), reaching peak efficiency at 310 nm. Upon exposure, it intercepts high-energy photons and converts them into harmless thermal energy, effectively preventing DNA damage and solar erythema.
Research
Clinical Evidence
High confidence4%
Key findings
- 01 Clinical evaluation at 8% concentration confirmed minimal dermal absorption (0.259%), ensuring the ingredient remains on the skin surface with negligible systemic presence.
- 02 In vitro analysis at 4mM demonstrated a significant reduction in cyclobutane pyrimidine dimers (CPDs), protecting cellular integrity against UVB-induced mutations.
Transparency
Dusting Analysis
As a regulated active sunscreen agent, it is rarely 'dusted' because specific concentration levels are required to achieve and claim a measured SPF rating. Using it below 1% would generally serve no functional protective purpose.
The Formula
Formulation
Stability
Requires precise neutralization with alkaline agents like Sodium Hydroxide to maintain solubility; if the formulation pH drops below 6.8, the ingredient will crystallize and precipitate.
Synergies
- Avobenzone
- Water-soluble antioxidants
- Humectants
Conflicts
- High-concentration Carbomers
- Highly acidic actives (L-Ascorbic Acid)
- Specific waterproofing polymers
Safety
Safety Profile
While the EU permits up to 8%, regions including the US, Canada, and Australia cap usage at 4%. It is widely recognized for its excellent safety profile and lack of phototoxic potential.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential UV filter for achieving high-SPF protection in elegant, water-based textures without the heaviness of traditional oils.
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