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Sodium carbonate, washing soda, soda ash and soda crystals is an inorganic compound with the formula Na2CO3 and its various hydrate It is white, water-soluble salt that yield alkaline solutions in water It is produced in large quantities from sodium chloride and limestone by the Solvay process Applications: As a cleansing agent for domestic purposes like washing clothes, it is a component of many dry soap powders detergent properties through the process of saponification which converts fats and grease to water-soluble salts manufacture of Glass industry, chemical intermediates, metallurgy, soaps and detergents, pulp & paper, flue gas emissions, coal treatment, ion exchange In the manufacture of sodium compounds like borax Properties: CAS Number 497-19-8 (anhydrous) EC Number 207-838-8 Chemical formula Na2CO3 Molar mass 105.99 g/mol (anhydrous) Appearance white solid, hygroscopic Odor Odorless Density 2.54 g/cm3 @25 °C (anhydrous) Melting point 851 °C (anhydrous) HS Code 28362090