Does baking soda often contain small amounts of sodium chloride?

Speaking of baking soda, many people are familiar with it. It is a common chemical, namely sodium bicarbonate. Baking soda can be used as a leavening agent in food processing, so it is often used to fry dough sticks. In fact, many people may not know that baking soda also contains a small amount of sodium chloride. What is going on? Below, I will give you a detailed introduction.

Sodium bicarbonate, commonly known as baking soda. White fine crystals, less soluble in water than sodium carbonate. It is an industrial chemical with low toxicity. The solid begins to gradually decompose at above 50°C to produce sodium carbonate, carbon dioxide and water, and completely decomposes at 440°C. Sodium bicarbonate is an acid salt formed by the neutralization of a strong base and a weak acid, and it exhibits weak alkalinity when dissolved in water. This property allows it to be used as a leavening agent in food preparation. Sodium bicarbonate will leave residual sodium carbonate after reaction. Using too much will make the finished product have an alkaline taste.

Decomposes easily when heated. Decomposes slowly in moist air. The reaction starts to produce CO? at about 50℃, and it is completely converted into sodium carbonate at 100℃. It decomposes rapidly in weak acids, and its aqueous solution begins to decompose into carbon dioxide and sodium carbonate at 20°C, and is completely decomposed at the boiling point.

When mass-producing foods such as steamed bread and fried dough sticks, baking soda is often dissolved in water and mixed into the dough. When heated, it decomposes into sodium carbonate, carbon dioxide and water. The overflow of carbon dioxide and water vapor can make the food more fluffy, and sodium carbonate remains in the food. For example, the "alkali bun" commonly known in the north can be tasted if too much baking soda is added. Sodium bicarbonate can be directly used as raw material in the pharmaceutical industry to treat excessive gastric acid. It can also be used in film production, leather tanning, mineral processing, smelting, metal heat treatment, as well as in the fiber and rubber industries.

Baking soda usually contains a small amount of sodium chloride, and the content of sodium chloride per unit mass of baking soda can be determined by chemical calculation. There are two types of baking soda: industrial soda and edible soda. When using them as food leavening agents, be sure to distinguish them to prevent accidents. Also, you can use baking soda to whiten your teeth, you can also try it.