How long is the shelf life of China salt?

The shelf life of edible salt in Zhongyan is generally about three years.

According to national regulations, the shelf life of salt is three years. In fact, salt has no shelf life. As long as it is properly preserved and does not make the salt wet, it can be eaten normally. If it is unopened edible salt, it can still be eaten after three years, but if it is unopened edible salt, it is best not to eat it after three years, because some other trace elements will be added to the salt now, which will affect the shelf life of the salt.

It should be noted that salt may absorb moisture and impurities in the air during storage, leading to caking or yellowing. If these things happen to salt, it is not recommended to continue eating. In addition, salt should be placed in a dry, ventilated and dark place to avoid humidity and direct sunlight.

Introduction of salt

1. Sea salt: Sea salt is made from sea water. Seawater enters the evaporation pool through tidal absorption, is evaporated and concentrated by the sun to make saturated brine, continues to evaporate and crystallize in the crystallization pool, and then is collected manually or mechanically and piled up to complete production. Sea salt has low sodium chloride content, contains various trace elements needed by human body, and does not add any anti-caking agent.

2. Well salt: the salt made by extracting underground brine by drilling wells is called well salt.

3. Mineral salt: As the name implies, mineral salt is the salt mined from salt mines, such as rock salt in the desert, Sichuan salt, and mineral salt collected hundreds of meters underground in Poland. Mineral salts are rich in minerals.

4. Lake salt: Lake salt generally refers to green salt. Green salt is a kind of lake salt crystal of halite salt family, which is extracted directly from salt lake brine and dried in salt field. It mainly contains sodium chloride, trace elements of silicon, iron and aluminum, major elements of calcium and magnesium, and trace elements of manganese, titanium and strontium.

5. Earth salt: The salt produced in Xuanhua of Shaanxi and Zhili, Xining County of Shanxi, Taiyuan, Xugou County of Gansu and Gaolan County in the Qing Dynasty was only sold locally and was called Earth salt. Later, the salt produced by Mongolian flag was also shipped to Shanxi for sale, and it was soil salt.

The above contents refer to Baidu Encyclopedia-China Salt Industry Group Co., Ltd.