DL-Threonine is a racemic mixture of the two enantiomers of the essential amino acid threonine. It is a white crystalline powder with the molecular formula C4H9NO3 and a CAS number of 80-68-2. As an amino acid, it contains both an amino group and a carboxyl group, along with a hydroxyl group on its beta-carbon, making it a polar, hydrophilic molecule. Its primary applications are in the fields of nutrition, pharmaceuticals, and biochemical research. In animal nutrition, particularly for poultry and swine, DL-threonine is a critical feed additive used to formulate balanced diets, ensuring optimal growth and health. In pharmaceutical contexts, it serves as a key raw material or intermediate in the synthesis of various drugs and infusion solutions. In life science laboratories, it is used as a fundamental biochemical reagent for cell culture media, microbiological studies, and as a building block for peptide synthesis. While the L-enantiomer is the biologically active form, the racemic DL-form is industrially produced and widely utilized due to cost-effectiveness in many applications where stereospecificity is not strictly required. It is generally recognized as safe (GRAS) for its intended uses.