 Pure platinum is a lustrous , ductile , and malleable , silver @-@ white metal . Platinum is more ductile than gold , silver or copper , thus being the most ductile of pure metals , but it is less malleable than gold . The metal has excellent resistance to corrosion , is stable at high temperatures and has stable electrical properties . Platinum reacts with oxygen slowly at very high temperatures . It reacts vigorously with fluorine at 500 ° C ( 932 ° F ) to form tetrafluoride . It is also attacked by chlorine , bromine , iodine , and sulfur . Platinum is insoluble in hydrochloric and nitric acid , but dissolves in hot aqua regia to form chloroplatinic acid , H2PtCl6 . 
