Sodium formate-d is used in biochemical and pharmaceutical research as an isotope tracer, particularly for studying metabolic pathways of biomolecules. The deuterium (D) isotope enables precise tracking of chemical changes in biological systems. It is commonly employed in NMR spectroscopy and mass spectrometry to identify molecular structures during metabolic processes. Additionally, it serves as a starting material for synthesizing isotopically labeled compounds in advanced research applications. Suitable for hydrogen-deuterium exchange experiments and deuterium enrichment reactions.