Octadecanedioic acid

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

Where is Octadecanedioic acid used?

• Lubricant and metalworking fluids: friction modifier and corrosion inhibitor that improves film persistence on metal surfaces under load
• Coatings and adhesives: incorporated into polyamide and polyester resins to enhance flexibility, adhesion, and substrate wetting
• Personal care: modifies emulsion texture and improves spreadability in skin-conditioning products
• Sealants and elastomers: chain extender or crosslinking co-monomer to tune mechanical properties in specialty polymer systems
• Its symmetrical 18-carbon diacid structure enables surface modification, emulsification, and lubrication functions.

Good to know: Higher-purity grades are available for personal care and cosmetic formulations where tighter specification control is required.