[7440-16-6] Rh (MW 102.91) InChI = 1S/Rh InChIKey = MHOVAHRLVXNVSD-UHFFFAOYSA-N (active catalyst under mild conditions for hydrogenation of unsaturated compounds including aldehydes, ketones,1h,7 and aromatic carbocyclic1 and heterocyclic structures;1a,g,k high stereospecificity and low hydrogenolytic activity) Form Supplied in: rhodium supported on alumina, carbon, or silica containing 0.5–5.0% of the metal are available commercially. Handling, Storage, and Precautions: the unused supported catalysts are not pyrophoric but rhodium supported on a finely divided carbon, like carbon itself, can undergo a dust explosion. After use, the catalysts are likely to contain adsorbed hydrogen which may ignite when the catalyst dries.1f,h Use in a fume hood.