Product: Benzophenone-3 (BP-3)
Rchem Benzophenone-3 is a high-purity, broad-spectrum chemical (organic) UV filter, presented as a fine, off-white to pale yellow crystalline powder. This versatile filter is renowned for its ability to absorb a wide range of UV radiation, particularly in the UVA-II and UVB regions. It has been a historical cornerstone ingredient in sunscreen formulations for providing secondary UVA protection and preventing photodegradation of the product itself. However, its use is now subject to increasing regulatory scrutiny and consumer preference shifts.
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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Chemical Formulae
Frequently Asked Questions:
What is the primary function of Benzophenone-3?
Its primary function is to act as a broad-spectrum UV filter, absorbing both UVB and the shorter UVA-II wavelengths. It also serves a secondary, critical role as a formulation photostabilizer, protecting the product itself from breaking down in sunlight.
BP-3 is controversial due to several factors: Health Concerns: It is a known skin sensitizer and allergen for some individuals. Studies have shown it has high rates of systemic absorption and potential endocrine-disrupting properties. Environmental Impact: It has been identified as a contributor to coral reef bleaching and is toxic to marine life, leading to bans in several regions (e.g., Hawaii, Key West, Palau). Regulatory Status: Its maximum allowed concentration has been reduced in the EU, and it is not currently classified as a GRASE (Generally Recognized as Safe and Effective) ingredient by the US FDA for OTC sunscreens.
Why is Benzophenone-3 a controversial ingredient?
Its approval is region-specific. It is still approved for use in many countries, including the EU (at a maximum of 6%) and others. However, it is banned or restricted in several locations, primarily due to environmental concerns. Formulators must check the regulations of their target market.
Is Benzophenone-3 still approved for use?
For UVA protection, alternatives include Benzophenone-4 (for water-soluble products), Avobenzone (when stabilized), and mineral filters like Zinc Oxide. For product stabilization, alternatives like Diethylhexyl Syringylidene Malonate or Ethylhexyl Methoxycrylene can be used.
What are common alternatives to Benzophenone-3?
Store in a cool, dark, dry place. As a fine powder, use PPE (gloves, dust mask) to avoid inhalation and skin contact. It must be dissolved in the oil phase. Formulators must be acutely aware of the legal and regulatory status for their intended markets and consider consumer perception and potential for skin sensitization. Always refer to the Safety Data Sheet (SDS) for comprehensive handling information.
