Molecular formula: ( NaPO3) 6 Molecular weight: 611.82 Properties: Transparent glass-like powder or scaly solid , Relative Density is 2.484, high deliquescence in air , dissolve in water: 973.2g per 1L water at 20° C, PH of 1% solution is 5.5-6.5, not dissolve in organic solvent , hydrolyze to positive phosphate in neuter mediums. Quality index: Item Unit Index Total Phosphate ( as P2O5) % e68.0 Inactive Phosphate ( as P2O5) % d7.5 water insoluble matter % d0.06 Fe( Fe) % d0.05 PH - 5.8-6.5 As ( As) % d0.0003 Heavy metals( as Pb) % d0.001 Fluoride ( as F) % d0.003 Uses: 1, Mainly used in circulating water treatment as flotation agent and dispersant 2, As preservative used in foods . 3, Widely used in mining , artesian well , textiles, printing and dyeing and so on . Packing: 25kg/ PE bag lined composite water-proof kraft bag