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| Inspection Items | Agricultural superior grade | Agricultural first grade | Agricultural qualified grade |
|---|---|---|---|
| Purity% ≥ | 99 | - | - |
| Moisture% ≤ | 0.3 | 0.5 | 0.9 |
| Cl- Chloride (as Cl)% ≤ | 0.2 | 1.2 | 1.5 |
| Sulphate (as SO42-)% ≤ | 0.005 | - | - |
| Insoluble Matter in Water% ≤ | 0.05 | - | - |
| Fe% ≤ | - | - | - |
| Moisture absorption rate% ≤ | - | - | - |
| K2O% ≥ | 46 | 44.5 | 44 |
| Nitrogen (in nitrate)% ≥ | 13.5 | 13.5 | 13.5 |
| Free ion content% ≤ | 0.5 | 1.2 | 2 |
The dissolution of matter in water actually involves two processes of change: one is the process of physical change in which the particles (molecules or ions) of solute overcome the mutual force and diffuse into water under the action of solvent molecules (water in aqueous solution); The other is the process in which solute particles (molecules or ions) interact with water molecules to form hydrated molecules or ions, which is a process of chemical changes. These two processes exist at the same time. Depending on the hydration and diffusion of solute particles in the solvent (water), they leave the solute body and evenly diffuse to the water molecules, thus gradually dissolving.
The hydration and diffusion process of solute particles is difficult to observe with the naked eye, but it can be confirmed by experiments. In addition, when solute particles diffuse in water, they need to absorb heat to reduce the temperature of the solution. When solute particles and water molecules combine to form hydrated molecules or hydrated ions, heat will be released, raising the temperature of the solution.
Plastic woven bag or paper plastic composite bag, lined with plastic bag, net weight 25 / 50kg/Jumbo bag.
Store in a cool, ventilated and dry warehouse. Pay attention to moisture and keep away from heat and kindling. Not related to organic matter, sulfur, etc. Combustibles, reducing agents and acids are stored and transported together to prevent explosion. Rain and sun exposure shall be prevented during transportation. Be small when loading and unloading. Mind gently to prevent impact.
