Overview
Benzophenone additive, chemically known as diphenylmethanone, is an organic compound with significant industrial utility. It is primarily recognized for its role as a UV stabilizer and photoinitiator. The compound's ability to absorb ultraviolet light makes it invaluable in protecting materials from UV degradation. In industrial settings, benzophenone is often incorporated into polymers, coatings, and inks to enhance their durability and performance. Its versatility extends to applications in adhesives and as a polymerization aid, where it acts as a catalyst or inhibitor depending on the process requirements.
Physical and Chemical Properties
Benzophenone additive is a white crystalline solid with a characteristic mild aromatic odor. It has a molecular weight of 182.22 g/mol and a density of 1.11 g/cm³. The compound melts at 47-49 °C and boils at 305 °C, making it stable under a wide range of temperatures. Its solubility profile shows high compatibility with organic solvents such as ethanol and acetone, but it is virtually insoluble in water. This property is critical for its use in solvent-based formulations. The compound's UV-absorbing capability is due to its conjugated aromatic structure, which effectively dissipates UV energy as heat.
Main Applications
The primary application of benzophenone additive is as a UV stabilizer in plastics, particularly in polyethylene and polypropylene. It prevents photodegradation, thereby extending the lifespan of plastic products exposed to sunlight. In the printing industry, it serves as a photoinitiator in UV-curable inks and coatings. Additionally, benzophenone is used in adhesives to control polymerization rates. Its role in personal care products, such as sunscreens, is limited due to regulatory restrictions, but it remains a staple in industrial formulations where UV protection is paramount.
Safety and Storage
Benzophenone additive requires careful handling to minimize health risks. Prolonged exposure can cause skin and eye irritation, and inhalation of dust or vapors should be avoided. Personal protective equipment (PPE), including gloves and goggles, is recommended during handling. Storage conditions are crucial for maintaining the compound's stability. It should be kept in a cool, dry place, away from direct sunlight and moisture. Containers must be tightly sealed to prevent contamination and degradation. Proper ventilation in storage areas is essential to avoid the buildup of vapors.
B2B Procurement Guide
When procuring benzophenone additive, B2B buyers should prioritize suppliers with certifications such as ISO or REACH compliance. Key specifications to verify include purity (typically 99% or higher), CAS number (119-61-9), and packaging integrity. Pricing varies based on quantity and purity, with bulk purchases often attracting discounts. Buyers should also consider logistical factors, such as lead times and storage capabilities, to ensure a smooth supply chain. Sampling before large-scale orders is advisable to confirm product quality.
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