Salt generally has a shelf life of three years.
According to national regulations, the shelf life of salt should be at least three years. In fact, salt has no shelf life, as long as it is stored properly and not allowed to become moist, it can be consumed normally. If it is unopened salt put three years can still be eaten, but if it is opened salt, put three years long, it is best not to eat, because now the salt will add some other trace elements, will affect the shelf life of salt.
The types of salt are sea salt, well salt, mineral salt, lake salt, soil salt, etc. The main component of salt is sodium chloride. The main component of salt is sodium chloride, and the state regulations stipulate that the sodium chloride content of well salt and mine salt shall not be less than 95%. Table salt contains barium salt, chloride, magnesium, lead, arsenic, zinc, sulfate and other impurities. Table salt is iodized salt made by adding a certain amount of iodine agent to refined salt, crushed and washed salt, and sun-dried salt.
Selection of salt
1, look at the appearance, good quality use of salt is mostly clean white color, some storage time is longer, or poor quality of edible salt will be presented with yellowish brown or gray.
2, look at the shape of the salt grains, high-quality salt salt grains of uniform size, and looks translucent, there is no impurity in it.
3, smell, decide to buy salt before, you can grab a handful of salt smell it, generally speaking good salt smell is not any flavor, the poor quality of the odor.
4, observe the outer bag, real or fake salt can be distinguished from the bag material, the regular producers of salt packaging is generally thicker, touch feel thick.
5, look at the anti-counterfeiting mark, each packet of salt bag with anti-counterfeiting mark, the position is relatively fixed.
6, look at the seal, real salt is automatic heat packaging, the seal will be soft and uneven, with the hand feel uneven.
7, look at the side of the crease, real salt is a molding package, there will not be any crease.
8, look at the salt, real salt particle size is more uniform, white color, more dry, there will be no lumps of phenomenon.