400 grams of salt per package. Salt, also known as edible salt, is one of the most important substances for human survival and the most commonly used seasoning in cooking. The main chemical component of salt is sodium chloride, and its content in table salt is 99% (belonging to mixture). Sodium chloride, the main component of salt, ionic compound. Pure sodium chloride crystal is a colorless and transparent cubic crystal. Due to the existence of impurities, sodium chloride is generally white cubic crystal or fine-grained powder with a specific gravity of 2. 165(25/4℃).

The melting point is 80 1℃, the boiling point is 1 442℃, the density is 2. 165g/cm2, it is salty and easy to deliquesce with impurities. Soluble in water or glycerol, insoluble in ethanol and hydrochloric acid, neutral and conductive in aqueous solution.

Recommended methods for preserving edible salt

1, stored in a dry and cool place. Edible salt should be stored in a dry and cool place to avoid salt deterioration due to moisture. If the salt is packed in plastic bags or paper bags, it can be placed in a sealed container to ensure the freshness of the salt.

2. Avoid direct sunlight. Sunlight will make salt wet and sticky, so avoid direct sunlight. It is a good choice to store edible salt in a dark place or use an opaque container.

3. Use desiccant Put some desiccant in the salt box or container to absorb the moisture in the air and keep the salt dry. Simple materials, such as silica gel, dried straw or rice, can also achieve the same effect.