Disodium phosphate (DSP) Chemical formula: Na 2 HPO 4 'XH 2 O (X=0,12) Molecular weight: 358.0 Standard executed: HG/T2767-1996 Properties: White or colorless granular crystals, and easy to airslake and dissolve in water and not dissolve in alcohol, relative density is 1.63melting point is 34.6 C. Applications: Mainly used for the fire retardant of textile, wood and paper, boiler water-softening agent, etc. Package and storage: Plastic-woven sack with polythene inner bagnet weight per bag is 25kg,50kg and 100kg. keep in dry and windy conditions. Technical Specifications: No. standard name anhydrate Na 2 HPO 4 Twelve hydrates Na 2 HPO 4 .12H 2 O industrial grade food grade industrial grade food grade 1 Main content %e 98.0 98.0 97.0 97.0 2 PH(1%water solution) 8.5-10.0 8.5-10.0 8.8-9.2 8.8-9.2 3 Sulphate%d 0.7 0.25 4 Heavy metal(as Pb)%d 0.001 0.001 5 Arsenic(As)%d 0.0003 0.0003 6 Fluoride(as F)%d 0.005 0.005 7 Water insoluble %d 0.10 0.10 0.10 0.10