SOP 52%
Tag list： SOP 52%
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Product Description
Chemical Name: Potassium Sulphate 52%
Molecular Formula: K₂SO₄
Molecular Weight: 174.27
CAS No: 7778-80-5
EINECS: 231-915-5
▏Properties
Potassium sulfate is white powder, small hygroscopicity, not easy to agglomerate. With good physical properties, convenient for application, it is a good water-soluble potash fertilizer. Potassium sulfate is chemically neutral, physiological acid fertilizer. It is a chlorine-free, high quality and efficient potash fertilizer. In particular, it is indispensable important fertilizer for the crops of tobacco, grapes, sugar beets, tea, potatoes, flax and various fruit trees which should avoid chlorine. It is also raw materials of high-quality NPK fertilizer. The density is 2.66g/cm³. Its melting point is 1074℃, and boiling point is 1670°C. Solubility: 111 g/L at 20℃ water，insoluble in alcohol, carbon disulfide and acetone.
▏Composition
NO. | TEST | SPECIFICATION |
1 | Appearance | White crystal |
2 | K₂O | ≥52.0% |
3 | S | ≥17.0% |
4 | Cl | ≤2.0% |
5 | Moisture | ≤1.0% |
6 | Insoluble matter in water | ≤1.0% |
▏Application
Crops | Spraying time | Concentration |
rice | In the differentiation period of young ear, the initial heading stage, full heading to grain filling stage | 1% |
wheat | In the differentiation period of young ear, boot stage, until full heading time | 1% |
grape | In berry enlargement period | 0.5% |
melon vegetables | In the whole growth period, spray 3-5 times at intervals of 7-10 days | 0.5% |
root vegetables | In the whole growth period, spray 3-4 times at intervals of 7-10 days | 0.5%- 1% |
potato | 40-45 days before harvest, spray 2-3 times at intervals of 10 days | 1%-2% |
tobacco | Start to spray 10 days before squaring, keep for 2-3 times at intervals of 10 days | 1%-1.2% |
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