(1S,2S)-(−)-1-Phenylpropylene oxide is widely used in organic synthesis as a chiral building block for the production of pharmaceuticals and fine chemicals. Its epoxide ring structure makes it a valuable intermediate in the synthesis of various biologically active compounds, particularly in the development of chiral drugs. The compound is often employed in asymmetric synthesis to introduce stereochemistry into target molecules, enabling the creation of enantiomerically pure substances. Additionally, it serves as a precursor in the synthesis of β-amino alcohols, which are important in the production of ligands, catalysts, and other chiral auxiliaries. Its application extends to agrochemicals and materials science, where it contributes to the development of specialized polymers and coatings.