The purity of potassium chloride fertilizer varies with different mineral sources, and the general potassium chloride content is more than 90% to 95%, containing K2O60% to 63%, and containing chlorine (Cl)47.6%. In addition, it also contains a small amount of sodium, calcium, magnesium, bromine and sulfate. Pure potassium chloride is white cube crystal. However, the potassium chloride obtained by dissolution crystallization and flotation is generally powdery and granular, and is pink or dark red because it contains iron. Potassium chloride made from bittern is usually light yellow and granular. 1 cubic meter potassium chloride fertilizer weighs 0.Chemicalbook9 ~ 0.95 tons. Each ton of potassium chloride accounts for about 1.05 to 1.09 cubic meters of volume. Potassium chloride has hygroscopicity, when the relative humidity is above 80%, there is slight hygroscopicity, the relative humidity increases to more than 90%, it will be serious hygroscopicity and begin deliquescence, caking after a long time; When the content of impurities such as sodium chloride is high, the hygroscopic and caking properties are enhanced. Potassium chloride soluble in water, water temperature 0℃, per 100 kg of water can dissolve 27.6 kg, 100℃ can dissolve 56.7 kg. The aqueous solution is neutral.
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