[Chemical name] sodium carbonate [Chemical formula] Na2CO3 [Common or alternative name] Washing soda, soda ash [Source and description] 
Grocery; "Arm & Hammer" Cloth, art stores; Washing soda is used to treat wool fibers. Pool supply; used to raise pH (increasing alkalinity) under brand names such as PH Up and PH Plus. Can easily be made by baking Sodium Bicarbonate (baking soda) at 350 degrees.