Brassylic acid

Brassylic acid (CAS 505-52-2), also known as tridecanedioic acid or brassilic acid, is a 13-carbon aliphatic dicarboxylic acid derived from erucic acid via ozonolysis. It carries no assigned E-code and is catalogued under EC 208-011-4. The compound is commercially referenced under the synonym NSC 9498.

In polymer synthesis, brassylic acid serves as a difunctional monomer that reacts with diamines or diols to build polyamide and polyester chains with defined chain length and thermal properties. In lubricant formulations, its dicarboxylate structure coordinates with metal surfaces and base oils to reduce friction under high-load conditions. Personal care chemists use it as a plasticizing agent in film-forming systems to adjust flexibility and feel.

Brassylic acid is supplied in solid powder form and is subject to REACH registration requirements for quantities above one tonne per year within the EU. It is classified under HS code 29171990. Buyers should confirm grade specifications and documentation requirements directly with the supplier.