Used as a stable isotope-labeled internal standard in mass spectrometry-based lipidomics and metabolomics studies to accurately quantify diacylglycerols and related lipid species in biological samples. Its labeled carbon atoms enable clear differentiation from endogenous compounds, improving measurement precision. Commonly applied in research on lipid metabolism, signal transduction pathways, and metabolic disorders. Also utilized in tracing lipid biosynthesis and degradation in cell cultures and animal models due to its metabolic stability and detectability.