Used as a deuterated solvent in NMR spectroscopy, providing a non-reactive environment for analyzing molecular structures. It is particularly valuable in studies requiring isotopic labeling to track chemical reactions or metabolic pathways. Its deuterated form enhances spectral clarity by reducing interference from hydrogen signals. Additionally, it serves as a reference standard in mass spectrometry for accurate quantification and identification of compounds. In organic synthesis, it can act as a deuterated reagent for introducing deuterium atoms into target molecules, aiding in mechanistic studies or stability testing.