The appearance is white crystalline or amorphous white powder, easy to dissolve in water, aqueous solution is slightly alkaline, slightly soluble in alcohol, moisture absorption, high temperature self - solution. Relative density 2.338, 204 ℃ when the molecular internal dehydration into potassium pyrophosphate. The pH of 1% aqueous solution is 8.9.

1. It is mainly used in the industry of medicine (penicillin and streptomycin), and can also be used as a decanter and pH regulator for talcum powder.

2. Used as water treatment agent, microorganism and fungus culture agent.

3. The food industry is used as the raw material for the preparation of the alkaline water, the fermentation agent, the flavoring agent, the leavening agent, the mild alkaline agent of the dairy product, and the yeast food, which is sometimes added to the milk tea powder. It can also be used as feed additive.

4. Used as a buffer in chemical analysis for the phosphating of metals and as an electroplating additive

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