Sodium hydrogen carbonate is a chemical compound commonly known as baking soda. There are several synonyms for this compound including sodium bicarbonate, bicarbonate of soda, bread soda, cooking soda, and sodium acid carbonate. These synonyms are used interchangeably in various industries such as baking, pharmaceuticals, and agriculture. Sodium bicarbonate is widely used as a leavening agent in baking because it releases carbon dioxide when it reacts with acid, causing cakes and bread to rise. Additionally, this compound is used in medicine to treat acidosis and indigestion. Overall, regardless of the synonym used, sodium hydrogen carbonate remains a versatile and essential compound in the modern world.