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
|
|
湖北省瑞琪化工有限公司
Hubei Ruiqi Chemicals Co., Ltd.
