Physicochemical Properties
Appearance : colorless or white crystal.
Relative density : 1.62 g/cm3
Melting point : 73.3 ~ 76.7 ºC
Solubility : Soluble in water, insoluble in ethanol and carbon disulfide.
Attribute: Colorless acicular hexagonal crystal. In dry air, twelve crystal waters are lost at 100ºC and become anhydrous substance (Na3PO4). The aqueous solution is alkaline and has a certain erosion effect on the skin.
Applications
Soft water agent, detergent, boiler descaling agent. Used in tanning as a degreasing agent and degumming agent. Detergent for bottle washer and sugar juice, photographic developer, fabric mercerizer, rubber milk coagulant; Also has certain application in medical pharmacy.
Specification
tem |
Industrial Grade
|
||
Superior grade
|
First grade
|
Second grade
|
|
Na3PO4·12H2O %≥
|
98.5 | 98.0 | 95.0 |
Alkalinity of methyl orange (as Na2O) %
|
16.5-19.0 | 16.0-19.0 | 15.5-19.0 |
Water insoluble %≤
|
0.05 | 0.10 | 0.30 |
Sulphate(as SO4-2) %≤
|
0.05 | 0.50 | 0.80 |
Chloride ( as Cl-) %≤
|
0.30 | 0.40 | 0.50 |
pH Value (10g/L Solution)
|
11.5~12.5 | ||
Iron(Fe) %≤
|
0.01 | 0.01 | 0.01 |
Arsenics(As) %≤
|
0.005 | 0.005 | 0.05 |