| Industrial Grade | Food Grade |
| Total phosphate, as P2O5%≥ | 68.0 | 68.0 |
| Inactive phosphate, as P2O5%≤ | 7.5 | 7.5 |
| Iron, as Fe %≤ | 0.05 | 0.05 |
| Ph value (1% solution) %≤ | 5.8-7.3 | 5.8-6.5 |
| Solubility | Qualified | Qualified |
| Heavy metals, as Pb %≤ | - | 0.001 |
| Arsenic, as As%≤ | - | 0.0003 |
| Fluoride as F%≤ | - | 0.003 |
| Water insoluble %≤ | 0.05 | 0.06 |
Molecular Formula : (NaPO3)6
M.W: 611.77
Basic Characteristics: Melting point of 616 (decomposition), the relatives density of 2.484g/cm3(20),soluble in water, do not dissolve in organic solvents,transparent glass sheet of white granulated or white granulated or crystal,strong Hygroscopicity.
Properties: White powder, density is 2.484 (20℃), easily soluble in water, but not in organic solution, absorbent to dampness, and turn sticky when absorbed dampness in air.
Application:For industrial use, such as oil field, paper-making, textile, dyeing, petrochemical industry, tanning industry, metallurgical industry and building material industry, it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; Diffusant in papermaking; slow corrodent, floating agent, dispersing medium, high temperature agglomerant, detergent and soil analytical chemistry reagent. For food grade, it is mainly used as additive agent, PH adjusting agent and fermentation agent, and nourishment.
