Sodium bicarbonate (NaHCO₃), commonly known as baking soda, is an inorganic compound with the national standard GB 186.2. It is a white, fine crystalline solid with a lower solubility in water than sodium carbonate. It is a white powdery crystal or opaque,clinic, fine crystal. It is odorless, salty in taste, soluble in water, and insoluble in ethanol. Its solubility in water is 7.g (18℃) and 16.0g (60℃).
Sodium bicarbonate is the acid salt generated by the neutralization of strong base and weak acid, which exhibits a weak alkalinity when dissolved in water This property can make it a leavening agent in the process of food production.
he chemical properties of baking soda are stable at room temperature, decompose easily when heated, decompose rapidly above 50 ℃, lose all carbon at 270 ℃, no change in dry air, and decompose slowly in humid air. It can react with both acids and bases. When reacting with an acid it produces the corresponding salt, water, and carbon dioxide, and when reacting with a base, it produces the corresponding carbonate and water. In addition, it can also react with salts, and undergo double hydrolysis with aluminum chloride and chloric aluminum, producing aluminum hydroxide and sodium salt, as well as carbon dioxide
Uses of baking soda 1. Pharmaceutical industry: Sodium bicarbonate can be directly used as a raw material in the pharmaceutical industry for the treatment of excessive gastric acid. 2. Food processing In the food manufacturing industry: Sodium bicarbonate is widely used as a leavening agent, especially in the production of biscuits and bread. However, sodium bicarbonate may be left after use, and excessive use may increase the alkalinity of the food, which can damage the flavor and turn its color to yellowish brown. In addition, it is also a key ingredient in the production of carbon dioxide in carbonated beverages. Sodiumicarbonate can also be combined with alum to make alkaline baking powder, or with soda ash to make household lye. It can also be used as a preservative butter. When processing vegetables, sodium bicarbonate can be used as a color fixative for fruits and vegetables. During the washing process of fruits and vegetables, adding about0.1% to 0.2% sodium bicarbonate can help maintain the stability of green color. As a fruit and vegetable processing agent, sodium bicarate can improve the pH value of fruits and vegetables by cooking and soaking, enhance the water-holding capacity of proteins, promote the softening of food tissue cells, and help dissolution of astringent components. In addition, sodium bicarbonate has a deodorizing effect on sheep's milk, and the recommended usage is 0.001% to 0.002%. 3. Fire-fighting equipment Used in the production of acid-base fire extinguishers and foam fire extinguis.
