Overview
Adipic acid, chemically known as hexanedioic acid, is a dicarboxylic acid primarily derived from cyclohexane. It is a white crystalline powder with a slightly acidic taste and is widely recognized for its role in nylon production. As a key industrial chemical, adipic acid is valued for its non-toxic and biodegradable properties. First synthesized in the late 19th century, adipic acid has become indispensable in various industries, including textiles, automotive, and food. Its versatility and stability make it a preferred choice for manufacturers seeking sustainable and efficient raw materials.
Physical and Chemical Properties
Adipic acid exhibits a melting point of 152-154°C and a boiling point of 337.5°C, making it stable under normal processing conditions. Its density is 1.36 g/cm³, and it is soluble in water, alcohol, and acetone. These properties facilitate its use in diverse industrial applications. The compound is non-volatile and biodegradable, reducing environmental impact. Its mild acidity (pKa ~4.43) allows it to act as a buffer in food and pharmaceutical formulations. These characteristics underscore its suitability for large-scale industrial use.
Main Applications
Adipic acid is a cornerstone in nylon 6,6 production, accounting for over 60% of its global consumption. It reacts with hexamethylenediamine to form this durable synthetic polymer, widely used in textiles and automotive parts. Beyond nylon, adipic acid serves as a precursor for polyurethane foams, plasticizers, and food additives (E355). Its non-toxic nature permits use as an acidity regulator in beverages and gelatin desserts. The compound’s versatility extends to adhesives, coatings, and lubricants, highlighting its industrial significance.
Safety and Storage
While adipic acid is generally safe, prolonged exposure may cause mild skin or eye irritation. Workers should wear gloves and goggles when handling the powder. Ensure adequate ventilation to minimize dust inhalation. Store adipic acid in a cool, dry place away from oxidizing agents and strong bases. Use polyethylene or stainless-steel containers to prevent contamination. Proper storage extends shelf life and maintains product integrity, crucial for B2B buyers.
B2B Procurement Guide
When sourcing adipic acid, prioritize suppliers with ISO or REACH certifications to ensure quality and regulatory compliance. Key specifications include purity (≥99.5%), moisture content, and particle size. Bulk buyers should negotiate contracts based on quarterly price trends. Consider logistics: adipic acid is typically shipped in 25-kg bags or 1-ton super sacks. Verify packaging integrity upon delivery. For niche applications (e.g., food-grade), request additional documentation like FDA or EFSA compliance certificates.
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