Deuterated dichloromethane

Deuterated dichloromethane (CD$2$Cl$2$) is a form (isotopologue) of dichloromethane (DCM, CH$2$Cl$2$) in which the hydrogen atoms (H) are deuterium (heavy hydrogen) ($2$H or D). Deuterated DCM is not a common solvent used in NMR spectroscopy as it is expensive compared to deuterated chloroform.