Used as a cross-linking agent in polymer synthesis, particularly in the production of specialty resins and polyurethanes. It functions as a bifunctional alkylating agent, enabling the introduction of tosyl groups to modify reactivity in organic intermediates. Commonly employed in pharmaceutical synthesis to build molecular frameworks where controlled spacer length and solubility are required. Also utilized in the preparation of crown ether analogs and as a derivatizing agent in analytical chemistry for enhancing detection of polar compounds. Its liquid form and stability make it suitable for solution-phase reactions in fine chemical manufacturing.