Rhodium black is a gray powder metal. It is pure and has no visible inclusions and oxidation color. Corrosion resistance is high, even insoluble in boiling Aqua regia. But hydrobromic acid corrodes rhodium slightly. Moist iodine and sodium hypochlorite can also corrode rhodium.
Boiling Point of Rhodium Black: Melting Point at 3727 C: Density at 1966 C: 12.41
Rhodium black can be used as raw materials for electrical instruments, chemical industry and manufacturing precision alloys. It is mainly used in electronic materials, surfactants and pharmaceutical intermediates.
For the storage of rhodium black, it is necessary to keep it in a cool and dry place.