Industrial salt is widely used in industry and is one of the most basic raw materials in the chemical industry. It is called the "mother of the chemical industry." The main products of basic chemical industry, hydrochloric acid, caustic soda, soda ash, ammonium chloride, chlorine, etc. are mainly used industrial salt as raw material.
    Industrial salt refers to the original salt, salt lake salt, well salt and sea salt points, which because of sea water into a variety of elements dissolved in water, so the industrial value of sea salt is relatively higher, lower edible value.