2-Chloro-acetyl-2-13C Chloride is a stable isotope-labeled compound used as a versatile intermediate in organic synthesis and pharmaceutical research. The incorporation of carbon-13 (13C) at the 2-position enables precise tracking in metabolic studies and NMR spectroscopy, enhancing analytical accuracy. This reagent is particularly valuable for synthesizing isotopically labeled pharmaceuticals, agrochemicals, and other fine chemicals, where isotopic purity is critical. Its reactive chloroacetyl group facilitates efficient acylation reactions, making it a useful building block for complex molecular structures. The compound is supplied with high isotopic enrichment and chemical purity, ensuring reliable performance in research and industrial applications. Proper handling under inert conditions is recommended due to its moisture sensitivity.