Used primarily as a reactive intermediate in organic synthesis, especially in the production of polyether polyols for polyurethane foams. It undergoes ring-opening polymerization to form polyethers, which are key components in coatings, adhesives, sealants, and elastomers. Also employed in the synthesis of surfactants, lubricants, and emulsifiers due to its ability to alkylate various nucleophiles. Its reactivity makes it valuable in fine chemical manufacturing, including pharmaceuticals and agrochemicals, where it serves as a building block for more complex molecules.