Salt has a shelf life of one to three years. Salt refers to table salt, which has a shelf life, and it should not be stored for too long, three years is appropriate. It should be noted that although salt, vinegar and other foods do not need to be labeled shelf life, but in order to maintain a better taste, it is best to use up within one year. According to the national "food labeling management" for salt, vinegar, as well as solid sugar substances, under normal conditions, is not spoiled. If the salt added calcium, iron, zinc and selenium and other trace elements of salt, it is necessary to label the shelf life. Such as low-sodium salt shelf life of 3 years; plus iron salt shelf life is 1 year; plus selenium salt, plus calcium salt, plus zinc salt shelf life is 8 years; refined iodized salt shelf life of 5 years; iodized salt shelf life is 18 months, etc..