Synonyms: Sulisobenzone, 1-phenol-4-sulfonic acid

Water-soluble UVA and UVB filter. Highly stable, does not degrade in sunlight but protects other UV blocking agents from UV-induced degradation. Benzophenone-4 is easily soluble in water, propylene glycol, glyerin, ethanol and isopropyl alcohol. Due to its high acidity (pH < 2.5 in a 1% solution), a neutralizing agent (e.g. triethanolamine) must be added to elevate the pH to >3.5. Only short UVA (UVA-2, 290-360 nm) but not long UVA are filtered.

BENEFITS

Benzophenone-4 is widely used to safeguard cosmetics and personal care products from deterioration by absorbing, reflecting, or scattering UV rays. Benzophenone ingredients absorb and dissipate UV radiation, which serves as a protection for cosmetics and personal care products. Water-soluble UVA & UVB filter. Used primarily as UVA filter to help prevent colors from fading in your products. Enhances the ability of other ingredients to penetrate, while it itself does not penetrate very much. It also helps to stabilize UV sensitive formulations such as hair dyes, hair sprays and color enhanced formulations while providing protection of colorants against fading and helping stabilize fragrances and active ingredients against oxidation.

Please Note Regulatory Information: Sunscreens are registered as API (Active Pharmaceutical Ingredient) or OTC-drug with the FDA. This means that, if you want to sell products containing a sunscreen, your facility must be registered with the FDA and operate under cGMP guidelines. Further information about the FDA website.