(R)-1-Amino-3-chloropropan-2-ol hydrochloride is a derivative of 3-chloro-l,2 propanediol (α-chlorohydrin). 3-chloro-l,2 propanediol (a-chlorohydrin) is a male chemosterilant[1].
References:
[1].Heath E, et al. Initial experiments with cyproterone acetate and 1-amino-3-chloro-2-propanol hydrochloride in the male Virginia opossum (Didelphis virginiana). Andrologia. 1983 Jan-Feb;15(1):50-6.