Product: Benzophenone-4 (BP-4)
Rchem Benzophenone-4 is a high-purity, water-soluble chemical (organic) UV filter, presented as a fine, greenish-yellow to off-white crystalline powder. This versatile ingredient is the sulfonated, water-soluble analogue of Benzophenone-3 (Oxybenzone), designed specifically for use in aqueous-based formulations. Renowned for its ability to absorb UVA-II and UVB radiation, it is a cornerstone ingredient in water-based sunscreens, daily moisturizers with SPF, and personal care products where oil-soluble filters are difficult to incorporate, offering effective photoprotection without the oily feel.
Category: powder
Description
Key Features & Benefits:
● Excellent natural thickening agent with high viscosity at low concentrations
● Effective stabilizer for emulsions and suspensions in various formulations
● Clean-label ingredient suitable for organic and natural product formulations
● Improves texture and shelf life in food products
● Enhances viscosity and stability in cosmetic formulations
● Cost-effective alternative to synthetic thickeners and stabilizers
Technical Specifications Table:
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PALM DERIVATIVES STATUS
VEGAN SUITABLE
Chemical Formulae
Frequently Asked Questions:
What is the primary advantage of Benzophenone-4 over Benzophenone-3?
The primary advantage is water solubility. Benzophenone-3 (Oxybenzone) is oil-soluble and requires oils and emulsifiers to be incorporated into a formulation. Benzophenone-4 (Sulisobenzone) is water-soluble, allowing it to be used in clear, oil-free, sprayable, or gel-based sunscreens without the need for heavy oils or complex emulsification. This makes BP-4 ideal for lightweight, non-greasy formulations.
Absolutely. This is one of its most valued applications. BP-4 dissolves completely in water and water-alcohol systems, allowing formulators to create crystal-clear gel sunscreens, sprays, and mists. Unlike oil-soluble filters that can cause cloudiness or require emulsification, BP-4 produces transparent products with excellent aesthetics.
Can Benzophenone-4 be used in clear gel sunscreens?
Benzophenone-4 is generally considered to have a better safety profile than Benzophenone-3. While both are chemical UV filters, BP-4 (Sulisobenzone) has shown lower rates of skin sensitization and lower systemic absorption in studies. However, like all UV filters, it should be used within approved concentration limits, and formulators should conduct appropriate safety testing for their specific formulations.
Does Benzophenone-4 have similar safety concerns to Benzophenone-3?
Yes, it provides some photostabilizing benefits in water-based systems. However, it is less effective as a photostabilizer than oil-soluble options like Octocrylene. In water-based formulations containing Avobenzone, additional stabilization strategies may be required. We recommend stability testing for all UV filter combinations.
Is Benzophenone-4 suitable for photostabilizing other UV filters in water-based formulas?
Store in a cool, dry place in tightly sealed containers, protected from light. As a fine powder, use appropriate personal protective equipment (PPE) including a dust mask, gloves, and safety goggles. BP-4 is acidic in solution; therefore, the final formulation may require pH adjustment (typically to 5.0-7.0 for skin compatibility). It is best added to the water phase with gentle heating (40-50°C) to aid dissolution. Always refer to the Safety Data Sheet (SDS) for comprehensive handling and safety information.
