Properties: colorless or white acicular crystal; be soluble in water (the water solution is alkaline), insoluble in organic solvent; relative density 1.62(20�°C); melting point 73.3-76.7�°C (decomposition); effloresce in dry air, dewatering to anhydrous matter at 100�°C (Na3PO4). Technical Specifications: Specifications Superior quality First-grade Qualified products Trisodium Phosphate(as Na3PO4�·12H2O) %â?¥ 98.5 98.0 95.0 Sulfate( as SO4 ) %â?¤ 0.50 0.50 0.80 Chloride(as Cl ) %â?¤ 0.30 0.40 0.50 Water insoluble %â?¤ 0.05 0.10 0.30 methyl orange alkalinity(as Na2O) 16.5-19.0 16-09.0 15.5-19.0 Iron (Fe) %â?¤ 0.01 0.01 0.01 Arsenic (As) %â?¤ 0.005 0.005 0.05 Application: Used as water softener, cleaning agent in electroplating, boiler cleaner, mental antirusting agent, dyestuff intermediate desiccant, sugar juice purifying agent, photographic developer, coagulating agent of rubber late, color fixer in fabric dyeing flux in enamel ware manufacturing and so on. Testing Item Standard Result Phosphorus(P)/% â?¥22 22.51 water soluble phosphorus/% â?¥20 21.38 Calcium(Ca)/% â?¥13 14.38 Fluorine(F)/% â?¤0.18 0.13 Arsenic (As)/% â?¤0.0020 0.0008 Heavy Metal (Pb)/% â?¤0.0030 0.0006 Cadmium(Cd)/% â?¤0.0010 0.0001 Chromium(Cr)% â?¤0.0030 0.0004 Size(powder pass 0.5mm test sieve)/% â?¥95 conforms Size(granule pass 2mm test sieve)/% â?¥90 conforms Note: When a user with special requirements for fineness, negotiated by the supply and demand sides