β-Chloroprene

β-Chloroprene (CAS 126-99-8, EC 204-818-0), also known commercially as Chloroprene or Chlorobutadiene, is a reactive vinyl monomer with the molecular formula C4H5Cl. It carries no assigned E-code and is classified within the monomers and building blocks category.

β-Chloroprene serves as the primary monomer in the production of polychloroprene (neoprene) rubber, where free-radical polymerization converts it into a high-performance synthetic elastomer used in seals, gaskets, and adhesive formulations. Its reactive chlorine substituent enables controlled chain growth and contributes to the flame resistance and chemical durability of the resulting polymer.

This material is supplied for industrial and research applications and falls under REACH regulation requirements within the European market. Procurement teams should confirm supplier documentation including Safety Data Sheets and substance registration status prior to ordering. Packaging formats and available grades vary by supplier and intended application volume.