Octadecanedioic acid

Octadecanedioic acid (CAS 871-70-5) is a long-chain dicarboxylic acid used as a functional building block and performance additive across lubricant, coating, and personal care formulations.

Its symmetrical 18-carbon diacid structure enables surface modification, emulsification, and lubrication functions that shorter-chain diacids cannot match in industrial applications.

In lubricant and metalworking fluids, it acts as a friction modifier and corrosion inhibitor, improving film persistence on metal surfaces under load for better performance.

Coating and adhesive formulators incorporate it into polyamide and polyester resins to enhance flexibility, adhesion, and substrate wetting in various industrial finishes and protective layers.

Personal care manufacturers use it to modify emulsion texture and improve spreadability in skin-conditioning products, providing a smooth and consistent application for the end user.

Sealant and elastomer compounders also source it as a chain extender or crosslinking co-monomer to tune mechanical properties in specialty polymer systems and high-performance materials.

Octadecanedioic acid is supplied as a white to off-white powder or flake. Technical grade is the standard commercial form for industrial applications including lubricants and coatings.

Higher-purity grades are available for personal care and cosmetic formulations where tighter specification control is required to meet the rigorous demands of the beauty industry.