Molecular Formula: (NaPO3)6
·M.W.: 611.77
·Basic Characteristics: Melting point of 616 ℃ (decomposition), the relative density of 2.484 g/cm3 (20 ℃), soluble in water, do not dissolve in organic solvents, transparent glass sheet of white granulated or crystal, strong Hygroscopicity.
·Industrial-grade quality standards: HG/T2519-93
·Food-grade quality standards: GB1890-2005

Industrial Grade	Food Grade
Total phosphate(P2O5)≥68.0%	68.0
Non-active phosphate(P2O5)≤7.50%	7.50
Iron, as Fe≤0.05%	0.05
Ph value(1% solution)≤5.8~7.3	5.8~6.5
Solubility Qualified	Qualified
Water insoluble ≤ 0.05 %	0.06
----	Heavy metals, as Pb≤0.01%
----	Arsenic, as As≤0.0003%
----	Fluoride, As F≤0.03%