Palladium-carbon (Palladium on carbon,pd/c) catalysts are catalysts for catalytic hydrogenation in organic synthesis. CAS number 7440-05-3. Usually black powder or pellets containing 0.5%~30% palladium, insoluble in all organic solvents and acidic solutions. Palladium-carbon is capable of catalyzing hydrogenated, acetylene, ketone, nitrile, Amine, azide, nitro compounds, benzene ring and heterocyclic aromatic compound. It can also be used as a palladium (0) Catalyst in Suzuki reaction, Stille reaction and other related reactions.