Adipic acid, also known as fatty acid, is an important organic dicarboxylic acid with the structural formula HOOC(CH?)?COOH. It can undergo salt formation reactions, esterification reactions, amidation reactions, and can undergo polycondensation with diamines or diols to form high molecular polymers.

Adipic acid is primarily used as a raw material for nylon 66 and engineering plastics, as well as in the production of various ester products. It also serves as a raw material for polyurethane elastomers and an acidulant for various foods and beverages, sometimes outperforming citric acid and tartaric acid.
Adipic acid is also a raw material for pharmaceuticals, yeast purification, pesticides, adhesives, synthetic leather, synthetic dyes, and fragrances.
Adipic acid has a mild and lasting sour taste, with minimal pH changes over a wide concentration range, making it an excellent pH regulator.

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