N-Methyl-2-thiazolidinethione is an accelerator for the vulcanization of chloroprene rubbers. Neoprene is produced by free-radical polymerization of chloroprene. Epoxy resins, phenol based and rubber based adhesives using chloroprene and neoprene are Structural. It improves the bonding of chloroprene to wire. The agency identified releases of chloroprene as responsible for the high risk. However, the report remarked that chloroprene holds the potential to leach into groundwater supplies. Only stabilized chloroprene can be transported in U.S.. Chloroprene is related but it is a synthetic monomer. As a vapor, chloroprene is heavier than air. Chloroprene is a monomer for the production of synthetic rubbers such as Neoprene. Chloroprene is on OSHA's list for substances that are regulated as toxic and hazardous. In streams, chloroprene is stated to volatilize quickly with a half-life of 3 hours.