This carbon-donor ligand, also known as IPr, presents as a white to pale yellow crystalline powder. It is known to be soluble in methanol. Store in a refrigerator, under inert gas - this substance is heat sensitive, moisture sensitive and air sensitive. 1,3-Bis(2,6-diisopropylphenyl)-1H-imidazol-3-ium-2-ide is incompatible with oxidizing agents and acids and should not be stored or handled in their vicinity. This chemical causes skin irritation as well as serious eye irritation.