Molecular Formula: Na4P2O7 Molecular Weight: 265.9 Properties: White powder; Soluble in water but insoluble in ethanol; Relative density 2.45 and melting point 890℃; deliquescent in the open air. Its aqueous solution shows weak alkalinity and is stable at 70℃ but will be hydrolyzed into disodium phosphate when boiled. Uses: In food industry it is used as buffering agent, emulsifier, nutrition ingredients and quality improver for tinned food and juice. Packing and storage: 25Kg or 50Kg bags, stored in draughty, dry and clean place, avoid moisture. Standard executed: HG/2923-1999 Item Food Grade Assay (Na4P2O7), %≥ 96.5 Phosphorus pentoxide, % ≥ 51.5 Ortho Phosphates, Qualified pH (1% water solution), 9.9-10.7 Water insoluble, % ≤ 0.20 Fineness (through 60 mesh sieve), % ≥ 90 Fluoride (as F ), % ≤ 0.005 Heavy metal (as Pb), % ≤ 0.001 Arsenic(As), % ≤ 0.0003 Loss on Drying %, ≤ 0.50