Number the carbon atoms serially, so that the branch where the chlorine is attached comes at a lower number. Thus carbon atom number 2 and not 3 has the Cl atom attached to it. Properties of neoprene 1. Neoprene is non-inflammable. This property is opposite to that of natural rubber made from latex.
Neoprene is unreactive to many industrial chemicals such as oil, grease, petrol, other solvents.
Natural rubber is reactive to all these chemical agents. Neoprene does not change shape even at lower or higher temperatures. Thus neoprene can be used over a wide range of temperatures. Neoprene in principle is a thermoplastic rubber. It can re-used again and again.