Tantalum carbide. A transition metal carbide; Black or dark brown metallic powder, cubic crystal system, hard, insoluble in water, slightly soluble in sulfuric acid and hydrofluoric acid, and soluble in the mixed solution of hydrofluoric acid and nitric a

Chromium carbide (Cr3C2) is a grey powder with metallic lustre. Orthorhombic system; The density is 6.68g/cm3; The melting point is 1890 ℃, and the boiling point is 3800 ℃; It has good wear resistance, corrosion resistance and oxidation resistance under h

Chromium carbide (Cr3C2) is a grey powder with metallic lustre; Orthorhombic system; The density is 6.68g/cm3; The melting point is 1890 ℃, and the boiling point is 3800 ℃; It has good wear resistance, corrosion resistance and oxidation resistance under h

Zinc stearate is a lubricant. It can be used as a lubricant protector to treat skin inflammation. It can be used alone, combined with other powders, or prepared into an emulsion

Zinc stearate is a lubricant. It can be used as a lubricant protector to treat skin inflammation. It can be used alone, combined with other powders, or prepared into an emulsion

Fine white powder. Melting point 147~149 ℃. Soluble in toluene, ethanol, benzene, and other organic solvents, insoluble in water. When heated to 400 ℃, it slowly decomposes, is flammable, and decomposes into stearic acid and corresponding calcium salt in

Black or black to brownish black amorphous crystalline powder, slightly hygroscopic, soluble in dilute acid, cyanide alkali or ammonium carbonate solution, slowly soluble in ammonia water, almost insoluble in water and alcohol. Copper oxide can be made in

Black or black to brownish black amorphous crystalline powder, slightly hygroscopic, soluble in dilute acid, cyanide alkali or ammonium carbonate solution, slowly soluble in ammonia water, almost insoluble in water and alcohol. Copper oxide can be made in

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.

Cuprous oxide, molecular formula Cu2O, dark red or brown crystalline powder. It is easy to oxidize in moist air, insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, and ammonia water, and slightly soluble in nitric acid.