Use: N-(2-chloroethyl) pyrrolidine hydrochloride is a haloalkyl substituted pyrrolidine, which is used in the preparation of various pharmaceutical compounds, such as the estrogen receptor antagonist naproxidine and its analogues.

Chemical properties: colorless flake crystal, strong hygroscopicity, easy to become a solution in the air. Soluble in water, chloroform, methanol, ethanol, slightly soluble in acetone, ether. Insoluble in ethyl acetate, benzene, etc. The salt-free substance is a colorless liquid, unstable at room temperature and easy to form dimer. Melting point: 169-173℃.