Adipic acid, chemically known as hexanedioic acid (CAS 124-04-9), is a fundamental organic compound in the chemical industry. Its molecular structure, HOOC-(CH2)4-COOH, featuring two terminal carboxyl groups separated by a four-carbon chain, dictates its characteristic reactivity and wide-ranging applications, most notably in polymer synthesis. Understanding its properties and production methods is essential for chemists, engineers, and procurement professionals seeking to optimize its use. NINGBO INNO PHARMCHEM CO.,LTD., as a dedicated supplier, ensures consistent access to high-quality Adipic Acid.

Key Chemical Properties of Adipic Acid:

  • Appearance: Adipic acid typically presents as a white crystalline powder or solid.
  • Melting Point: It has a distinct melting point range, usually between 151-154 °C, indicative of its crystalline structure.
  • Solubility: Adipic acid exhibits moderate solubility in water, increasing with temperature, and is also soluble in polar organic solvents like ethanol and acetone.
  • Acidity: As a dicarboxylic acid, it possesses two acidic protons with pKa values of approximately 4.43 and 5.41, allowing it to readily form salts and esters.
  • Reactivity: The carboxyl groups are reactive, participating in esterification, amidation, and condensation reactions. This reactivity is key to its role as a monomer in polymer formation.
  • Molecular Weight: Its molar mass is approximately 146.14 g/mol.

Industrial Production of Adipic Acid:

The vast majority of Adipic Acid produced globally is synthesized via the oxidation of a mixture of cyclohexanone and cyclohexanol, often referred to as KA oil (ketone-alcohol oil). The primary oxidant used is nitric acid. This process is multi-step and involves the formation of intermediate nitrolic acids, with nitrous oxide (N2O) being a notable byproduct. While this is the most common industrial route, continuous research and development have explored alternative methods to improve efficiency and reduce environmental impact:

  • Oxidation of Cyclohexane: Direct oxidation of cyclohexane can also be employed, though it often yields a mixture of products requiring further separation.
  • Carbonylation of Butadiene: Methods involving the carbonylation of butadiene have also been developed as alternative synthesis pathways.
  • Oxidative Cleavage of Cyclohexene: Using hydrogen peroxide as an oxidant for cyclohexene is another route that produces water as the primary byproduct.

Sourcing High-Quality Adipic Acid

For applications demanding high purity and consistent quality, choosing a reliable Adipic Acid supplier is crucial. NINGBO INNO PHARMCHEM CO.,LTD. specializes in providing industrial-grade Adipic Acid that meets rigorous standards. Our efficient production processes and strict quality control ensure that our clients receive a dependable chemical intermediate for their manufacturing needs. Whether you are involved in polymer science, specialty chemicals, or other industrial applications, we are your trusted source for Adipic Acid. Contact us to discuss your procurement requirements and receive a competitive quotation.