What is the difference between industrial salt and edible salt?

1, the composition is slightly different.

Edible salt is relatively pure sodium chloride, which is harmless to the body and has no adverse effects. Industrial salt is not so particular, including not only sodium chloride, but also sodium nitrite with high content. The main components are nitrite ion and sodium ion. Nitrite is a carcinogen, and if you eat too much nitrite, you will have poisoning symptoms.

2. Different uses

Industrial salt is widely used in industry and is one of the most basic raw materials in chemical industry. Known as the "mother of chemical industry". Hydrochloric acid, caustic soda, soda ash, ammonium chloride and chlorine in the main products of basic chemical industry are mainly produced from industrial salt.

Edible salt is iodized salt made by adding a certain amount of iodine agent into refined salt, broken washing salt and sun-dried salt. Iodine in salt can only exert its biological activity in human body after it is converted into iodine ion. Iodide is very unstable in nature, and it is easy to decompose and volatilize and fail.

Extended data:

The salt in life refers to the salt extracted from seawater, salt ponds, salt wells and salt mines. Its main component is sodium chloride (NaCl), which is called sea salt, pond salt, well salt and rock salt respectively. In the past and in the future, humans rely on these kinds of salts to absorb the necessary inorganic salts. With the development of chemical industry and chemical science, the meaning of the word "salt" has been greatly expanded.

Middle school chemistry textbooks say that "salt" refers to a compound composed of "metal ions" (including ammonium ions) and acid ions. They have many kinds, different properties, different appearances and different uses.

The term "industrial salt" is unscientific. Before the industrial age, people referred to salt, especially the salt used for seasoning in life, rather than the "salt" in chemical science now. However, in real life, quite a few people are not well educated and can't tell the essential difference between "salt" in life and "salt" in chemistry, which leads to frequent incidents of eating toxic salt by mistake and group poisoning.