Sebacic acid, identified by its CAS number 111-20-6, is a versatile dicarboxylic acid that serves as a fundamental fine chemical with broad industrial applications. Its well-defined chemical structure and properties make it a valuable component in the production of polymers, lubricants, and various specialty chemicals.

Chemically, sebacic acid is a white, crystalline powder with the formula HO2C(CH2)8CO2H. It exhibits moderate solubility in water, dissolving more readily in alcohols like ethanol and ether. This solubility profile is advantageous for its incorporation into various chemical processes and formulations. Its melting point typically falls between 131-134.5°C, indicating its stability under normal processing conditions.

One of the most significant industrial uses of sebacic acid is as a monomer in the synthesis of polyamides, particularly Nylon 610. This application leverages its dicarboxylic acid functionality to create long polymer chains through condensation polymerization with diamines. Nylon 610, formed from hexamethylenediamine (6 carbons) and sebacic acid (10 carbons), is prized for its low moisture absorption, good chemical resistance, and excellent dimensional stability, making it suitable for demanding applications in the automotive, electrical, and consumer goods industries.

In addition to its role in polymer manufacturing, sebacic acid is a crucial ingredient in the production of plasticizers, lubricants, and hydraulic fluids. Sebacic acid esters enhance the flexibility and durability of plastics, improve the anti-rust properties of lubricating oils, and contribute to the thermal stability of hydraulic fluids. These applications are vital for maintaining the performance and longevity of industrial machinery and components.

Sebacic acid also serves as an intermediate in the creation of other valuable chemicals, including aromatics, antiseptics, and components for painting materials. Its reactive carboxyl groups allow for a variety of chemical transformations, expanding its utility across different manufacturing sectors.

The production of sebacic acid often involves the cleavage of ricinoleic acid derived from castor oil, making it a partially bio-based chemical. This origin aligns with a growing industry trend towards sustainable sourcing and production of chemicals.

In summary, Sebacic Acid (CAS 111-20-6) is a foundational fine chemical with a broad industrial footprint. Its key applications as a monomer for high-performance nylons, a component in lubricants and plasticizers, and an intermediate for specialty chemicals highlight its versatility and importance in modern manufacturing. Its properties and applications make it a consistently sought-after material in the chemical industry.