Overview
N-Phenylacetamide (acetanilide) is an aromatic amide derived from acetic acid and aniline. First synthesized in 1853, it was historically used as an analgesic and antipyretic before being replaced by safer alternatives due to toxicity concerns. Today, it serves primarily as a chemical intermediate in industrial applications. Its production typically involves the reaction of aniline with acetic anhydride or acetyl chloride. The compound's stability and reactivity make it valuable for synthesizing more complex organic molecules, particularly in pharmaceutical manufacturing.
Physical and Chemical Properties
As a crystalline solid, N-phenylacetamide exhibits moderate solubility in polar solvents, with solubility increasing at higher temperatures. Its melting point (113-115°C) allows for easy purification via recrystallization. The compound shows weak basicity due to the lone electron pair on the nitrogen atom. Chemically, it undergoes hydrolysis under strongly acidic or basic conditions to yield aniline and acetic acid. Electrophilic aromatic substitution reactions occur at the para position of the benzene ring. These properties are exploited in synthetic chemistry to create derivatives for specialized applications.
Main Applications
In pharmaceuticals, N-phenylacetamide is a precursor for sulfa drugs and paracetamol synthesis. The dye industry utilizes it to manufacture intermediates for azo dyes and other colorants. Rubber manufacturers employ it as a vulcanization accelerator to improve curing efficiency. Additional uses include stabilizers for hydrogen peroxide, plasticizers for cellulose esters, and corrosion inhibitors. Recent research explores its potential as a ligand in catalytic systems and as a building block for advanced organic materials.
Safety and Storage
While not highly toxic, N-phenylacetamide requires proper handling to avoid health risks. Prolonged exposure may cause methemoglobinemia, requiring immediate medical attention if symptoms like cyanosis appear. Always use PPE (gloves, goggles) when handling powdered material to prevent inhalation or contact. Store in original containers away from strong oxidizers, acids, and bases. Maintain storage temperatures below 30°C with relative humidity under 65%. For large quantities, ensure adequate ventilation and implement spill containment measures to prevent environmental contamination.
B2B Procurement Guide
Industrial buyers should verify supplier certifications (ISO, GMP) when purchasing pharmaceutical-grade material. Standard technical grade (≥98% purity) suits most chemical applications, while higher purity (≥99.5%) commands premium pricing. Bulk shipments typically use multi-layer paper bags with PE liners or fiber drums. Request COA (Certificate of Analysis) specifying impurity profiles, especially aniline content. Consider regional suppliers to minimize logistics costs, as China and India dominate global production. For consistent quality, establish long-term contracts with manufacturers rather than trading companies.
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