The difference between table salt and industrial salt

1. Structurally: Table salt is relatively pure sodium chloride. The chemical formula of sodium chloride is NaCl. The formula weight is 58.44, which is composed of chloride ions and Made of sodium ions. In addition to sodium chloride, industrial salt also contains excessive sodium nitrite. Its chemical formula is NaNO2, its formula weight is 69.00, and it is composed of nitrite ions and sodium ions.

2. In terms of properties: salt is relatively stable and its aqueous solution is neutral. Sodium nitrite is relatively stable under dry conditions, but it can slowly absorb oxygen and oxidize to sodium nitrate, and the aqueous solution is alkaline.

3. Appearance: Both are white. Under special circumstances, table salt may also appear yellow or light blue, and sodium nitrite may also appear slightly yellowish. Both are crystal-shaped, and there are certain differences in geometric shape under the microscope, but they cannot be distinguished with the naked eye.

4. Solubility: Sodium nitrite and table salt are both easily soluble in water, easy to deliquesce, and have no odor.

5. Taste: Sodium nitrite has a slightly salty taste, while table salt has a stronger salty taste. It is difficult to distinguish by taste when eating.

It can be seen from the above comparison that sodium nitrite is similar to table salt in appearance and taste, and can easily cause poisoning by accidental ingestion.

Mild poisoning generally does not require treatment, and severe cases should be sent to the hospital immediately for rescue. The main treatment measures are: 1. Inducing vomiting, gastric lavage and induction of vomiting. 2. Using the antidote methylene blue (melan) and vitamins has a certain effect on eliminating methemoglobinemia. 3. Give large doses of vitamin C and glucose.