Overview
Benzophenone oxime is an organic nitrogen compound derived from the condensation reaction between benzophenone and hydroxylamine. As a versatile chemical intermediate, it plays significant roles in industrial chemistry, particularly in polymer stabilization and specialty chemical synthesis. First documented in early 20th century chemical literature, this compound has gained prominence due to its chelating properties and thermal stability. Its molecular structure features both oxime (-NOH) and phenyl groups, enabling diverse reactivity patterns in synthetic applications.
Physical and Chemical Properties
The compound crystallizes in a monoclinic system with characteristic sharp melting point between 140-142°C, making it easily identifiable through thermal analysis. Its limited water solubility but good organic solvent compatibility suits industrial processes requiring phase-transfer conditions. Chemically, the oxime group demonstrates tautomerism (syn/anti forms) and participates in condensation, complexation, and oxidation reactions. The conjugated π-system enhances UV absorption properties, contributing to its utility as a light stabilizer in polymers. Thermal gravimetric analysis shows decomposition beginning above 200°C under inert atmosphere.
Main Applications
Approximately 60% of industrial benzophenone oxime consumption serves as a stabilizer in PVC and polyolefin production, where it scavenges free radicals and inhibits polymer degradation. In fine chemicals, it acts as precursor for benzophenone imine derivatives used in asymmetric synthesis. The agrochemical sector utilizes this compound in synthesizing certain fungicides and plant growth regulators. Recent pharmaceutical research explores its potential as a building block for kinase inhibitors and antimicrobial agents, though these applications remain at developmental stages.
Safety and Storage
As a Category 2 skin irritant under GHS classification, handling requires nitrile gloves, safety goggles, and proper ventilation. Dust formation should be minimized through closed-system processing or local exhaust ventilation. For long-term storage, maintain original packaging in temperature-controlled environments (15-25°C) with relative humidity below 65%. Incompatible with strong oxidizers and mineral acids. Shelf life typically exceeds 24 months when stored properly, though periodic purity checks are recommended for critical applications.
B2B Procurement Guide
Industrial buyers should prioritize suppliers offering batch-specific certificates of analysis (COA) with verified purity (≥98% by HPLC) and residual solvent content. Technical grade (95-97% purity) may suffice for some polymer applications at lower cost points. Bulk shipments (500kg+ drums) typically offer 15-20% cost savings versus small-quantity packaging. Just-in-time inventory management is advised due to moderate shelf life. Pre-shipment samples for FTIR verification are recommended when establishing new supplier relationships, particularly for pharmaceutical-grade material.
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