(S)-Tetrahydro-2H-pyran-3-amine hydrochloride is a chiral amine derivative featuring a tetrahydropyran ring. It is a white to off-white solid commonly used as a high-value pharmaceutical intermediate and a versatile chiral building block in organic synthesis. Its primary application is in the research and development of active pharmaceutical ingredients (APIs), particularly those targeting the central nervous system (CNS) and other therapeutic areas. The chiral tetrahydropyran-3-amine scaffold is a privileged structure found in several drug candidates and approved medicines, serving as a key component to modulate biological activity, solubility, and metabolic stability. It is frequently employed in the synthesis of complex molecules via amide bond formation, reductive amination, or as a precursor for further functionalization. As a specialty chiral amine, it is a valuable synthon in asymmetric synthesis and medicinal chemistry. Handling requires standard precautions for amine hydrochlorides, including the use of personal protective equipment in a well-ventilated area.