Industrial salt is one of the fundamental raw materials in the chemical industry, primarily composed of sodium chloride, and is referred to as the "Mother of Chemical Industry." It is categorized into solar-evaporated crude salt and refined industrial salt, with the solar-evaporated crude salt further divided into industrial coarse salt, white salt, and low-sodium salt; the refined salt is classified into premium and grade two. Industrial Salt: Coarse salt is mainly used for hot compresses and boiler water treatment.