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Chemical formula: Na3PO412H2O
Molecular weight: 380.14
Standard executed: HG/T2517-93
Properties: White or colorless crystals, efflorescent in air, easily soluble in water but not in organic solution. Its water solution is alkaline. pH value of 1% solution is 12.1, relative density at 1.62, melting point is 73.4 degree centigrade.
1. Industrial grade:
(1) Main content: 98.0% min. (2) P2O5: 18.3% min. (3) Sodium oxide, as Na2O: 15.5-19.0% (4) Sulfate, as SO4: 0.5% max. (5) Water insoluble: 0.1% max. (6) Chloride, as Cl: 1.5% max.
2. Food grade:
(1) Main content: 98.0% min. (2) P2O5: 18.3% min. (3) Sodium oxide, as Na2O: 15.5-19.0% (4) Sulfate, as SO4: 0.5% max. (5) Water insoluble: 0.05% max. (6) Arsenic, as As: 0.0003% max. (7) Fluoride, as F: 0.002% max. (8) Heavy metal, as Pb: 0.001% max. (9) Chloride, as Cl: 0.3% max.
Application: Used as water softening agent, cleaning agent in electroplating, color fixer in fabric dyeing and flux in enamel ware manufacturing and so on.
Packaging: Plastic-woven sack with polythene inner bag, Net weight: 25kg, 50kg or 1000kg. Stored in ventilated and dry place.