2,2'-(2-Hydroxypropane-1,3-diyl)bis(1H-isoindole-1,3(2H)-dione)-d8 is the isotope analog of 2,2'-(2-Hydroxypropane-1,3-diyl)bis(1H-isoindole-1,3(2H)-dione). 2,2'-(2-Hydroxypropane-1,3-diyl)bis(1H-isoindole-1,3(2H)-dione) is a reagent used for the preparation of functionalized tripodal ligands and their metal complexes for imaging applications.