(R)-(-)-4-Amino-3-hydroxybutanoic acid is a chiral, non-proteinogenic amino acid derivative. It is structurally characterized by a four-carbon backbone featuring both an amino group and a hydroxyl group on adjacent carbon atoms, with the stereocenter at the 3-position. This compound is a key building block in the synthesis of biologically active molecules. Its primary and most significant application is as a crucial chiral intermediate in the pharmaceutical industry. It serves as a core structural unit for the synthesis of (R)-Carnitine, an essential nutrient involved in fatty acid metabolism. Furthermore, it is a vital precursor in the production of (R)-4-Amino-3-hydroxybutyric acid (GABOB), a naturally occurring inhibitory neurotransmitter analog with potential therapeutic applications for neurological disorders. Its chirality is critical for biological activity. The compound is also utilized in the synthesis of other pharmacologically relevant targets and serves as a valuable chiral synthon in asymmetric synthesis. It is typically handled as a solid and requires storage under appropriate conditions to maintain stability.