This carbon-donor ligand, also known as IPr·HCl, presents as a white to slightly pale reddish yellow crystalline powder. It is known to be soluble in methanol. Store in a cool and dark place at ambient temperatures. 1,3-Bis(2,6-diisopropylphenyl)imidazolium Chloride is incompatible with oxidizing agents and should not be stored or handled in their vicinity. This chemical causes skin irritation as well as serious eye irritation.