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| - Solid additives include alkali metal salts such as sodium chloride, sodium bromide, potassium chloride, potassium sulfate, potassium phosphate, sodium benzoate, sodium acetate, sodium citrate, potassium nitrate and the like; the alkaline earth metal salts such as calcium chloride, calcium nitrate, and the like; the transition metal salts such as fabric chloride, ferrous sulfate, zinc sulfate, cupr
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