1,Formula :Na4P2O7
2,Formula wt, anhydrous 265.90
3,CAS: anhydrous [7722-88-5]
4,Specificity: Colourless or white crystals, or a white crystalline or granular powder, easily vaporize. It will loose water at 100°C. It will melt at 985°C, easily melt in water, can not melt in ethyl alcohol. Aqueous is alkalescence.
5,Packing: 25kg net paper bag or 1mt big bag with PE liner.
Name of index | FCC-V | E450(iii) |
Description | Colorless or white crystals, or a white crystalline or granular powder | |
pH of a 1 % solution | -- | 9.8-10.8 |
Assay (ignited basis) | 95-100.5% | ≥95%(ignited basis) |
P2O5 Content ,% | -- | 52.5-54 |
Lead, ≤% | 0.0004 | 0.0004 |
Water insoluble ,≤% | 0.2 | 0.2 |
Fluoride, ≤% | 0.005 | 0.001 |
Loss on Ignition | 1,Anhydrous:≤0.5%; 2,Decahydrate 38-42% | 1,Anhydrous ≤0.5% 2,Decahydrate 38% -42% 105°C,4h then 550°C30m) |
As,≤% | 0.0003 | 0.0003 |
Cadmium ≤% | -- | 0.0001 |
Mercury ≤% | -- | 0.0001 |
