Tetra Sodium Pyrophosphate(TSPP)
Byname:Tetra Sodium pyrophosphate
Molecular formula:Na4P2O7
Molecular Weight:265.9
Standard executed:HG/T2968-1999(Technical Grade)
GB8848-88(Food Grade)
CAS Number:7722-88-5
Guaranteed Technical Specifications
NO |
Specifications |
Industrial Grade |
Food Grade |
1 |
Appearance |
white powder or granular |
|
2 |
Assay (as Na4P2O7 )%≥ |
96.5 |
96.5 |
3 |
P2O5%≥ |
51.5 |
51.5 |
4 |
Ortho Phosphates |
pass |
pass |
5 |
PH Value |
9.9-10.7 |
9.9-10.7 |
6 |
Water Insoluble matter % ≤ |
0.1 |
0.1 |
7 |
Size (through 60mesh sieve) |
90.0 |
90 |
8 |
Fluoride (as F) ≤ |
|
0.005 |
9 |
Heavy Metals (as Pb) % ≤ |
|
0.001 |
10 |
Arsenic (As)% ≤ |
|
0.0003 |
11 |
L.O.I% ≤ |
|
0.5 |
Properties
White powder; Soluble in water but insoluble in ethanol; Relative density 2.45g/cm3and melting point 890℃; Deliquescent in the open air. Its aqueous solution shows weak alkalinity and is stable at 70 ℃ but will be hydrolyzed into di-sodium phosphate when boiled .
Uses
Applied in industries of detergents as detergent auxiliary, paper production to bleach and electroplating; In food industry it is used as buffering agent, emulsifier, nutrition ingredients and quality improver.
Packing and storage
In double layer bags of 25kg net. It must be stored in places well ventilated and dry.
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