Overview
2-Hydroxy-4-methoxybenzophenone, commonly known as oxybenzone or benzophenone-3, is an organic compound widely used as a UV absorber. It effectively absorbs UVB and short-wave UVA rays, making it a popular ingredient in sunscreens and other products requiring UV protection. First synthesized in the mid-20th century, this compound has become a standard in personal care and industrial applications due to its stability and effectiveness. Its ability to dissipate absorbed UV energy as heat without degrading makes it particularly valuable in formulations exposed to sunlight.
Physical and Chemical Properties
2-Hydroxy-4-methoxybenzophenone is a pale yellow crystalline powder with a molecular weight of 228.24 g/mol. It has a melting point of 62-65 °C and a boiling point of 150-160 °C at reduced pressure. The compound is soluble in common organic solvents like ethanol and acetone but is virtually insoluble in water. Its UV absorption peaks around 288 nm and 325 nm, covering a broad spectrum of UV radiation. The compound is chemically stable under normal conditions but may degrade under prolonged exposure to strong UV light or extreme temperatures.
Main Applications
The primary use of 2-hydroxy-4-methoxybenzophenone is as a UV filter in sunscreens and other personal care products, where it protects the skin from harmful UV radiation. It is also widely employed in plastics, coatings, and adhesives to prevent UV-induced degradation, extending the lifespan of these materials. In the packaging industry, it is used to protect contents from UV damage, particularly in food and pharmaceutical packaging. Additionally, it finds applications in hair care products, nail polishes, and other cosmetics where UV protection is desired.
Safety and Storage
While generally considered safe for use in regulated concentrations, 2-hydroxy-4-methoxybenzophenone can cause skin irritation in sensitive individuals. Proper personal protective equipment (PPE) including gloves and goggles should be used when handling the pure compound. The chemical should be stored in a cool, dry place away from direct sunlight and heat sources. Containers should be tightly sealed to prevent contamination and moisture absorption. In case of spillage, absorb with inert material and dispose of according to local regulations.
B2B Procurement Guide
When procuring 2-hydroxy-4-methoxybenzophenone, buyers should prioritize suppliers who provide detailed product specifications, including purity levels (typically 98-99% for industrial use) and proper CAS number verification. Request certificates of analysis and compliance with relevant regulations (e.g., REACH, FDA for specific applications). Consider ordering samples for quality testing before large purchases. Bulk purchases (typically 25kg drums or larger) generally offer better pricing, but ensure you have proper storage facilities. Lead times can vary depending on supplier location and current market demand, so plan procurement accordingly.
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