1,Chemical Name: Sodium Carbonate 2,Molecular Formula:CNa2O3 3,Molecular Weight: 105.99 4,CAS: 497-19-8 5,Character: Anhydrous is a white crystalline powder, relative density 2.53, melting point 851 oC, heated to 400 oC decomposition. Insoluble in ethanol, soluble in water, dissolved when heat, solution is strongly alkaline. Easily deliquescence agglomeration in the air, absorb CO2 and produce sodium bicarbonate. Monohydrate as a fine white crystal or powder, the relative density of 1.55. Stable at room temperature and heated to lose crystal water becomes anhydrous at 100 oC. Decahydrate colorless transparent crystallization temperature 34 oC, relative density (20 oC) 1.44, in the air easily weathered. 6,Usage: It is one of the important chemical raw materials used in making chemicals, cleaning agents, detergents, but also for photography and manufacturing pharmaceuticals products.