Contraindications to the use of dipotassium hydrogen phosphate trihydrate

Contraindications to the use of dipotassium hydrogen phosphate trihydrate
Dipotassium hydrogen phosphate trihydrate (CAS 16788-57-1), as an important chemical, is widely used in many fields such as agriculture, industry, medicine and food. However, despite its remarkable efficacy, there are some important contraindications to its use to ensure its effectiveness and safety.
1. Prohibition of mixing with alkaline products
The pH value of aqueous solution of Dipotassium hydrogen phosphate trihydrate is about 4.6, which is acidic. Therefore, when mixed with alkaline fertilizers (e.g. ammonia, lime, grass ash, calcium-magnesium phosphate fertilizer, ammonium bicarbonate, etc.) and pesticides, chemical reactions may occur, resulting in malfunction of Dipotassium hydrogen phosphate trihydrate. These chemical reactions may produce flocculation, precipitation, discoloration, heating or bubbling.
2. Prohibition of mixing with carbonate-containing products
Dipotassium hydrogen phosphate trihydrate should not be mixed with products containing carbonate (CO3-) because carbonate will react with the hydrogen ions of Dipotassium hydrogen phosphate trihydrate to form carbon dioxide gas. Such products include potassium carbonate, ammonium carbonate, ammonium bicarbonate, and sodium bicarbonate.
3. Prohibit mixing with products containing copper ions.
Dipotassium hydrogen phosphate trihydrate should not be mixed with products containing copper ions, such as copper hydroxide, basic copper sulfate, calcium copper sulfate, cuprous oxide, copper complex, copper quinoline and so on. These copper ions will react with phosphate ions to form flocculations or precipitates.
4. Prohibition of application as base fertilizer
Because Dipotassium hydrogen phosphate trihydrate is easily soluble in water, it is easily washed away by rainwater when buried deep in the soil, and its fertilizer period is short, so it is not suitable for use as base fertilizer. The base fertilizer is usually a slow-release, long-lasting compound fertilizer.
5. Prohibit mixing with trace elements
Some free state of trace elements (such as calcium, magnesium, zinc, iron, etc.) are easy to react with Dipotassium hydrogen phosphate trihydrate to produce flocculent or precipitate. Therefore, mixing Dipotassium hydrogen phosphate trihydrate with these elements is not recommended. Trace elements in the sugar alcohol state are easily decomposed by light or high temperatures, and may also produce free state ions, leading to reactions.
6. Prohibition of mixing with specific pesticides
Dipotassium hydrogen phosphate trihydrate should not be mixed with pesticides such as zinc manganese diclofenac, zinc diclofenac, pesticide alum, manganese zinc methomyl, etc., because the mixture may produce precipitation or toxic gas.
7. Prohibit excessive use in the pre-growth stage
Dipotassium hydrogen phosphate trihydrate is not recommended to be used in the seedling stage and before the flowering stage of vegetables and beans, so as not to cause injury to seedlings and drop flowers and pods. Early use in soybean may even lead to yield reduction. 8.
8. Prohibit the use of high concentration solution at high temperature.
High temperature will cause Dipotassium hydrogen phosphate trihydrate solution concentration to increase, which is easy to cause fertilizer damage. Therefore, it should be used to avoid the high temperature in the middle of the day, preferably before 10:00 am or after 4:00 pm. In addition, too high concentration will also cause fertilizer damage. It is recommended to use 300-500 times spray for grass crops (e.g. wheat, rice) and 500-800 times concentration for other crops.
9. Prohibit the addition of emulsifiable oil pesticides first
When mixing with emulsifiable oil pesticides, Dipotassium hydrogen phosphate trihydrate should be dissolved first, and the emulsifiable oil should be added last so as not to affect the dissolution of Dipotassium hydrogen phosphate trihydrate. If the emulsifiable oil is added first, it may cause Dipotassium hydrogen phosphate trihydrate particles to be encapsulated by the oil and affect the effect.
Despite the various contraindications to the use of Dipotassium hydrogen phosphate trihydrate, it can significantly improve crop yield and quality and enhance crop resistance when used appropriately. When using it, care should be taken to avoid the above mentioned contraindications and to adjust the use method and concentration according to crop species, growth stage and environmental conditions.
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