NINGBO INNO PHARMCHEM CO.,LTD. offers an in-depth look at the chemical foundation of adipic acid, also known as hexanedioic acid. Understanding its structure and reactivity is key to appreciating its widespread industrial utility.

Adipic acid is an organic compound with the chemical formula C6H10O4. Structurally, it is a six-carbon chain with a carboxyl group (-COOH) at each end, classifying it as a dicarboxylic acid. This linear arrangement of saturated carbon atoms and the presence of two terminal carboxyl groups are fundamental to its chemical behavior.

Physically, adipic acid appears as a white crystalline solid with a melting point of approximately 152-154°C. It exhibits good solubility in water and polar organic solvents like ethanol and acetone, but is poorly soluble in non-polar solvents such as benzene. Its pKa values, around 4.43 and 5.41, indicate its nature as a moderately strong organic acid.

The reactivity of adipic acid is largely dictated by its two carboxyl groups. It readily undergoes esterification, forming adipate esters which are valuable as plasticizers. It can also react with diamines, such as hexamethylenediamine, in polycondensation reactions to form the robust nylon 6-6 polymer. This specific reaction is the cornerstone of its industrial importance, driving significant global demand for adipic acid manufacturing.

Adipic acid can also participate in intramolecular condensation reactions. For instance, upon heating with barium hydroxide, it can cyclize to form cyclopentanone. This chemical versatility makes it a target for various synthetic pathways. For businesses looking to leverage these properties, sourcing high-purity adipic acid from reputable adipic acid suppliers like NINGBO INNO PHARMCHEM CO.,LTD. is crucial for achieving desired reaction outcomes and product quality.