sodium bicarbonate 
noun [mass noun]
A soluble white powder used in fire extinguishers and effervescent drinks and as a raising agent in baking. Also called baking soda.
- Chemical formula: NaHCO3.
- The fizz comes from the production of carbon dioxide gas that is created when sodium bicarbonate (baking soda) reacts with acids.
- Traditional treatment of ethylene glycol poisoning consists of sodium bicarbonate, ethanol, and hemodialysis.