Potassium dihydrogen phosphate  Properties

Potassium dihydrogen phosphate acid Chemical nature

Colorless to white crystal or crystalline powder, odorless. The relative density is 2.338. Easily soluble in water but insoluble in ethanol. The aqueous solution is acidic, and the pH of the 2.7% aqueous solution is 4.2-4.7. Stable in the air. ADI0-70mg/kg (FAO/WHO, 1994).

Potassium dihydrogen phosphate acid Usage

1. Used as fertilizer, flavoring agent, brewing yeast culture agent, used to prepare buffer solution, and also used in medicine and manufacturing potassium metaphosphate.
2. Used for fertilization of rice, wheat, cotton, rapeseed, tobacco, sugarcane, apple and other crops, used as chromatography reagent and buffer, and also used in the synthesis of medicine
3. Used as a high-efficiency compound fertilizer of phosphorus and potassium, suitable for various soils and crops. It is also used as a bacterial culture agent, a flavoring agent for synthesizing sake, and a raw material for making potassium metaphosphate. It is used in medicine to acidify uric acid as a nutrient.
4. Prepare buffer solution, determine arsenic, antimony, phosphorus, aluminum and iron, prepare phosphorus standard solution, prepare various culture media for haplotype sports, determine the activity of inorganic phosphorus and alkaline oxidase in serum, prepare bacterial serum test hook The culture medium of the telomere, etc.
5. Used as feed nutrition supplement.
6. Used as a quality improver, it can improve the complex metal ions, pH value, and ionic strength of food, thereby improving the binding force and water retention of food. Our country stipulates that it can be used for wheat flour, the maximum use amount is 5.0g/kg; the maximum use amount in beverages is 2.0g/kg.

It can be used as fertilizer, flavoring agent, yeast culture agent, buffer solution preparation, medicine and potassium metaphosphate production.

As a feed phosphorus additive.

Used in the food industry to produce baked goods, as leavening agents, flavoring agents, fermentation aids, nutritional enhancers, and yeast foods. Chemicalbook is also used as a buffer, chelating agent.

Used as fertilizer, flavoring agent, brewing yeast culture agent, used to prepare buffer solution, and also used in medicine and manufacturing potassium metaphosphate.

Potassium dihydrogen phosphate Packaging production method

In the phosphoric acid metathesis method, a saturated potassium chloride solution and an excess of 75% phosphoric acid are used for metathesis reaction at 120-130°C.

The hydrogen chloride gas produced absorbs by-product hydrochloric acid with water; then potassium hydroxide is used to neutralize the excess phosphoric acid, and the control end point is The Ph value is 4.2～4.6;

the final product is obtained by cooling, washing, centrifuging and drying, and the mother liquor can be reused.

In the neutralization method, under constant stirring, the caustic potassium is made into a solution with a relative density of 1.3 (about 30%) and neutralized with 50% phosphoric acid;

the reaction temperature is maintained at 85-100℃, and the end point Ph value is controlled at 4.2-4.6( Congo red test paper is light purple);

the neutralization solution is concentrated to a relative density of 1.32 to 1.33, filtered, and then cooled to 36°C:

the product is crystallized below, centrifuged and dried, and the mother liquor can be reused.

Potassium carbonate can also be used for neutralization, the process is similar to the above. KOH+H3PO4→KH2PO4+H2O

Potassium dihydrogen phosphate Packaging and Shipping

Packaging:25kg/ bag, customer’s request

Shipping:It can be according to the customer’s request

Potassium dihydrogen phosphate Storage

Store at RT.

Potassium dihydrogen phosphate Nature and stability

Deliquescence. It melts into a transparent liquid when heated to 400°C, and solidifies into an opaque glassy potassium metaphosphate after cooling. Stable in air, soluble in water, insoluble in ethanol.