(2S)-2-amino-1,4-butanediol is a chiral amino diol compound. It serves as a versatile and valuable chiral building block in organic synthesis, particularly in the pharmaceutical industry. Its structure features both a primary amino group and two hydroxyl groups, making it a bifunctional precursor for constructing complex molecules. The primary application of this compound is as a key chiral intermediate in the synthesis of various active pharmaceutical ingredients (APIs). It is notably used in the production of antiviral drugs, such as certain nucleoside analogs, and other therapeutics where the (S)-configuration is crucial for biological activity. Its chirality and functional groups allow for the efficient construction of specific stereocenters and heterocyclic systems. As a commercially available chiral synthon, it is employed in asymmetric synthesis and medicinal chemistry research. It is also a precursor for ligands and catalysts. Handling requires standard precautions for amino alcohols, including protection from moisture and air.