Molecular Formula: Na4P2O7
Molecular Weight: 265.9
Properties: White powder; Soluble in water but insoluble in ethanol; Relative density 2.45 and melting point 890℃; deliquescent in the open air. Its aqueous solution shows weak alkalinity and is stable at 70℃ but will be hydrolyzed into disodium phosphate when boiled.
Uses: In food industry it is used as buffering agent, emulsifier, nutrition ingredients and quality improver for tinned food and juice.
Packing and storage: 25Kg or 50Kg bags, stored in draughty, dry and clean place, avoid moisture.
Standard executed: HG/2923-1999
|
Item |
Food Grade |
|
Assay (Na4P2O7), %≥ |
96.5 |
|
Phosphorus pentoxide, % ≥ |
51.5 |
|
Ortho Phosphates, |
Qualified |
|
pH (1% water solution), |
9.9-10.7 |
|
Water insoluble, % ≤ |
0.20 |
|
Fineness (through 60 mesh sieve), % ≥ |
90 |
|
Fluoride (as F ), % ≤ |
0.005 |
|
Heavy metal (as Pb), % ≤ |
0.001 |
|
Arsenic(As), % ≤ |
0.0003 |
|
Loss on Drying %, ≤ |
0.50 |