Big Green Salt Alias Green Salt. Rong Salt, Hu Salt, Boudeng Salt, Yin Tu Salt, Cold Salt, Ice Stone, Qiang Salt,, Rock Salt Attributed to Heart; Kidney; Liver; Lung; Bladder meridians Efficacy Diarrhea; Cooling Blood; Brightening the Eyes; Moistening Dryness Cure Urine and blood, vomiting blood, bleeding from the teeth and tongue, eye redness and pain, rotting strings of the wind and eyes, toothache. Usage and dosage: For internal use: decoction, 3-5 minutes; or into pills and powder. Externally: grated wipe teeth or hydrated gargle, wash the eyes. Large Chinese medicine stores sell regular salt between 0.03 ----0.045 per gram of raw and processed salt as raw materials for the chemical industry, the production of chlorine, bleaching powder, caustic soda and soda ash and other chemical products, is the use of salt in the main components of the chlorine element and sodium element. The "salt" used for food and the "salt" used in industry are both of the same chemical composition, but only for different purposes. Because the original salt is a product of nature, refined salt is also a simple processing of the original salt, in addition to the main ingredient sodium chloride, but also contains a variety of impurities, so it can not be called sodium chloride, and the convention is to use only one word "salt", specifically referred to as sodium chloride as the main ingredient, such as salt, sea salt, well salt, rock salt, iodized salt, non-iodized salt, refined salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt, salt. Iodized salt, refined salt, large salt, crushed salt, washed salt, etc.. According to the modern use should be divided into edible salt, industrial salt and other salt, if it is other chemical composition of the salt, be sure to say its specific trade name or chemical name, such as soda ash, baking soda, alum, ammonium sulfate, potassium nitrate, potassium chloride, diammonium phosphate, etc., all belong to the category of "industrial salt", the biggest feature is that it can not be eaten. The most important feature is that it is not edible.