Colorless or white crystal. Insoluble in water, insoluble in acids and bases. It is very stable and can be hydrolyzed when heated. Mainly used in aluminum smelting. It can be prepared by the action of aluminum trichloride and hydrofluoric acid and ammonia. It is mainly used to adjust the molecular ratio in aluminum electrolyzing bath as a flux. The anhydrous AlF3 supplied by our company an reduce environmental pollution;improve the production yield of aluminum smelters, and lower its electrolytic cost.