Hongjing

23

2019

-

09

Potassium dihydrogen phosphate


  【English name】Potassium Phosphate Monobasic

  【Formula】KH2PO4

  【Molecular weight】136.09

  【No. CAS】7757-93-9

  【Executive standard】HG2321-92

  【Character】

  Colorless tetragonal crystal or white crystalline powder, melting point of 252.6 ℃; relative density 2.338; water-soluble (83.5 g / 100 ml of water at 90 ℃), slightly soluble in alcohol, acidic water solution, pH of 1% potassium dihydrogen phosphate solution is 4.6, prone to deliquescence.

  【Quality indicators】

  Project    Industrial grade  Agriculture grade

  Executive Standard HG2321-92

Item

First grade

Qualified Product

Content of potassium dihydrogen phosphate  ≥

98.0

97.0

Potassium content

33.9

33.5

Moisture

2.5

3.0

PH value

4.3—4.7

Content of water-insoluble substances

0.2

0.5

Chloride content

0.20

——

Iron content

0.003

——

Arsenic content

0.005

——

Heavy metal content

0.005

——

  【Uses】

  In industries, they are mainly used as the raw materials for preparing microbes, fungi medium, pH buffers, phosphate, and potassium pyrophosphate in the pharmaceutical and fermentation industries; in the farming industry, they are mainly used as high-concentration and efficient phosphorus and potassium fertilizer, and high-quality chlorine potash, exhibiting a significant yield increasing efficiency and having functions of improving crop quality and enhancing the various resistances of crops. They are used in base fertilizers for crops and foliage application in the middle and late stages. They are suitable for all kinds of foods, cash crops and fruits, vegetables and so on. The effects on some bogey chlorine crops are even better.

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