Sodium carbonate also known as soda ash and washing soda is an alkaline product is used in production of detergents, water softening, and cooking (food additive). Sodium carbonate is an inexpensive alkaline substance used to adjust pH (increase pH) in swimming pools and aquarium water. Chemicalo formula: Na2CO3 Synonyms: Soda Ash; Disodium carbonate; Soda; washing soda,calcined soda; ASH; Carbonic acid disodium salt Technical grade. Also used in: Photography,cleaning and boiler compounds,pH control of water, analytical reagent. Free shipping available for orders of $50 and more. Safety Data Sheet for Sodium Carbonate