Used as a chiral derivatizing agent in asymmetric synthesis, particularly for the preparation of enantiomerically pure compounds. It acts as an efficient sulfonate leaving group in nucleophilic substitution reactions, enabling the introduction of oxirane functionality in a stereocontrolled manner. Commonly employed in the synthesis of β-blockers and other pharmaceutical intermediates where chirality is critical. Its strained epoxide ring allows for regioselective ring-opening reactions with nucleophiles such as amines, thiols, and alkoxides, making it valuable in the development of complex bioactive molecules. Also utilized in polymer chemistry to introduce cross-linking or functional handles in chiral polymers.