Overview
Benzophenone (99% purity) is an organic compound belonging to the class of aromatic ketones. It is characterized by its white crystalline appearance and mild floral odor. With its high purity grade, it is favored in industries requiring stringent quality control, such as pharmaceuticals and specialty chemicals. The compound is synthesized through the Friedel-Crafts acylation of benzene with benzoyl chloride. Its stability and UV-absorbing properties make it a valuable ingredient in multiple industrial processes, particularly in UV-curable resins and coatings.
Physical and Chemical Properties
Benzophenone exhibits a melting point of 48-51°C and a boiling point of 305°C, with a density of 1.11 g/cm³. It is sparingly soluble in water but dissolves readily in organic solvents like ethanol, ether, and benzene. These properties make it suitable for formulations where hydrophobic characteristics are desired. As a photoinitiator, benzophenone absorbs UV light efficiently, facilitating polymerization reactions in coatings and inks. Its chemical stability under normal conditions ensures long shelf life when stored properly, though it may degrade under prolonged exposure to strong light or heat.
Main Applications
In the pharmaceutical industry, benzophenone serves as an intermediate for synthesizing antihistamines and other active ingredients. Its role in fragrances stems from its mild, rose-like aroma, often used in soaps and perfumes. Another critical application is in UV-curable adhesives and coatings, where it acts as a photoinitiator to accelerate curing under UV light. Additionally, it is employed as a flavoring agent in food (in regulated quantities) and as a stabilizer in plastics to prevent degradation from sunlight.
Safety and Storage
Benzophenone can cause skin and eye irritation upon direct contact. Proper handling requires gloves, goggles, and adequate ventilation. Ingestion or inhalation of dust should be avoided, and spills must be cleaned using inert absorbents. Storage recommendations include keeping the compound in tightly sealed containers, away from light and heat sources. Compatibility with other chemicals should be verified, as benzophenone may react with strong oxidizing agents. Disposal must comply with local environmental regulations.
B2B Procurement Guide
When sourcing benzophenone (99% purity), prioritize suppliers who provide Certificates of Analysis (COA) to validate purity and trace impurities. ISO-certified manufacturers are preferred for consistent quality. Bulk purchases (e.g., 25 kg drums) often reduce costs, but ensure storage capacity aligns with usage rates to prevent degradation. Spot-check deliveries for crystallinity and odor consistency. For international procurement, confirm compliance with REACH or other regional chemical regulations.
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