Benzophenone-9
What is Benzophenone-9?
Benzophenone-9, chemically known as disodium phenyl dibenzimidazole tetrasulfonate, is a synthetic organic compound designed as a broad-spectrum ultraviolet absorber. Developed for cosmetic formulations, it belongs to the benzophenone family but features sulfonate groups enhancing its solubility in water-based products like sunscreens, moisturizers, and serums. Unlike physical blockers, it works by absorbing UVB and UVA II radiation through its aromatic structure, converting the energy into harmless heat before it can reach skin cells. This photostable ingredient integrates seamlessly into clear, non-greasy formulas, making it ideal for everyday use and water-resistant applications. Its high water solubility allows even distribution without oily residues, supporting lightweight textures in modern skincare.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Offers absorption of UVB and UVA II rays for daily protection
Enables water-resistant sunscreen formulations
Supports clear, lightweight product textures
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals seeking chemical UV filters in water-based sunscreens | Those with known allergies to benzophenone derivatives |
| People needing broad-spectrum protection in daily moisturizers | People experiencing photoallergic reactions to UV absorbers |
| Users preferring non-greasy sun defense options | Individuals sensitive to sulfonated compounds |
Safety Notes
- Considered safe for cosmetic use by regulatory reviews
- Low potential for skin penetration due to molecular structure
Frequently Asked Questions about Benzophenone-9
What does Benzophenone-9 do in skincare?
It absorbs UV rays, converting them to heat to protect skin from sun exposure in sunscreens.
Is Benzophenone-9 suitable for sensitive skin?
It shows low irritation potential in formulations, but patch testing is recommended for sensitivities.
How is Benzophenone-9 different from other UV filters?
Its water solubility makes it ideal for clear, non-oily products unlike many oil-soluble alternatives.