Rhodium is also called trichloride rhodium is a kind of red brown powder easy deliquescence Poisonous No water molecular weight 20926 melting point of 450 500 C decomposition The boiling point of 800 C sublimation To generate more fluoride above 600 C 70 C can be hydrogen reduction Insoluble in water acid soluble in cyanide Chemicalbook solution In the concentrated acid sulfuric acid heat decomposition When heated with sodium aluminum magnesium iron and other metals