I will sell double superphosphate formula 10:32. Double superphosphate is outwardly similar to simple superphosphate, but contains 2-3 times more absorbable phosphorus. Main
component of fertilizer – monocalcium phosphate monohydrate (Са(Н2РО4)2 x Н2О). The fertilizer contains a small amount of other components from impurities of natural phosphates. These are calcium sulfate, aluminum and iron phosphates, monomagnesium phosphate, silicon fluorides, unreacted phosphates, dicalcium phosphate, free phosphoric acid and free water.
The rate of mass fractions of fertilizer components varies depending on the brand of fertilizer:
Phosphates absorbed by plants - 38–46%.
Free acid H3PO4 - no more than 5.5–6.5%.
(//tractor-service.com)
Water - no more than 3%.
Looseness for all brands is not less than 100%.
According to the classification of the International Association of Superphosphate and Complex Fertilizer Production (ISMA), double superphosphate contains 25% P2O5, triple superphosphate - 43-44% P2O5. Therefore, in Western Europe, double superphosphate is called triple superphosphate.
Due to the high content of phosphates absorbed by plants, double superphosphate is a transportable fertilizer.