Tetrapotassium Pyrophosphate
Identification
Synonyms:
Diphosphoric acid, tetrapotassium salt; Potassium Diphosphate;
TKPP
CAS: 7320-34-5
Molecular Weight: 330.3033
Molecular Formula: K4P2O7
Structural Formula:
M.P.: °C
Freezing Point.: °C
Application
Used in cyanide-free electroplating as substitute
for sodium cyanide, detergent and metal
surface cleaning. Also used as emulsifier, sequestrant, and
texturizing agent in food industry
Specification*
Parameters
|
Specification
|
|
|
Technical grade |
High
purity grade |
Food
grade |
|
Content
|
96%
min.
|
|
|
|
P2O5 |
41.2% min. |
42.27%min. |
42.2%min. |
|
Cl |
0.45% max. |
0.45% max. |
0.11% max. |
|
Water
insolubles |
0.08%max. |
0.05%max. |
0.05%max. |
|
Iron
(Fe)
|
50 ppm max.
|
50 or 15 ppm |
10ppm |
|
Sulfate
|
-
|
- |
0.019%max. |
|
PO4 |
0.1N AgNO3 titration, no yellow deposition |
|
Heavy
metals as Pb
|
0.01%
max.
|
0.005% max. |
0.002% max. |
|
F |
- |
- |
10 ppm max. |
|
Arsenic |
- |
- |
3 ppm max. |
|
Loss
on ignition |
1% max. |
0.8% max. |
0.8% max. |
|
pH
value |
10.0~10.7 |
|
Appearance
|
white powder or granule |
white powder |
|
Expiry Date |
18 month |
12 month |
12 month |
Standard Packing
25kg/woven
bag or paper bag
Risks and Safety Info
HYGROSCOPIC!
Not regulated by UN. Safe for
see, land and air transportation.
For more details, please see
MSDS.
|
