Sodium carbonate, Na2CO3, (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates.
Sodium carbonate has many uses. It is used as a cleansing agent for domestic purposes. Sodium carbonate is a component of many dry soap powders. It is used for removing temporary and permanent hardness of water. It is used in the manufacture of glass, soap and paper.