Potassium series

Potassium Diphosphate


Potassium Diphosphate


Details:

Molecular formula: K4P2O7
Molecular weight: 330.34, white powder or lumpy. Soluble in water, insoluble in alcohol. It's hygroscopic in the air.
Application: mainly used in anaerobic electroplating, also used in detergent industry.
When hydrogen peroxide is used as oxidant to bleach leather products, it is often used as stabilizer with remarkable effect. In the washing industry, there are two specific conditions that must be potassium pyrophosphate. One is to control the foam heavy scale liquid detergent, one is the metal surface cleaning agent, this cleaning agent is alkaline, is conducive to the protection of the metal surface.
Main quality standards:

Item

superior grade

top grade

food grade

total content K4P2O7

96%

98%

98%-101%

chlorine content Cl

0.45%

0.45%

0.011%

iron content Fe

0.005%

0.005 or 0.0015%

10ppm

P2O5

41.2%above

42.27%above

42.2% above

water insoluble

0.08%

0.05%

0.05%

orthophosphate

Titrate with 0.1NAgNO3 without yellow precipitation

heavy metal (as Pb)

0.01%

0.005%

20ppm

loss on ignition

1%

0.8%

0.8%

appearance

white powder or granule

white powder

SO4

 

 

0.019%

fluorine content F

 

 

10ppm

arsenic content As

 

 

3ppm

PH

10.0~10.7

aqueous state

colorless or slightly turbid

expiration date

18 months

12 months

12 months

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