Deuterated methanol (CD<sub>3</sub>OD) is a form (called an isotopologue) of methanol (CH<sub>3</sub>OH) in which the hydrogen atoms ("H") are replaced with deuterium (heavy hydrogen) isotope ("D"). Deuterated methanol is a common solvent used in NMR spectroscopy.
Deuterated methanol was first detected in interstellar space in the KleinmannâÂÂLow Nebula in 1988 by scientists at the Max Planck Institute for Radio Astronomy.