... 8.2 g/cm3. Mp 1785 °C. Insoluble in water, soluble in ethanol, acid, hydrofluoric acid. Both sexes oxides, the ... t be H2 reduction, tantalum carbide, the hydride, nitrides in air oxidation heating preparation. For the preparation of metal Ta, ... benchmark reagents, catalyst and spectral blood coagulant. Widely used in the electronics industry, chemical industry, communications, metallurgy industry, ...