SODIUMACIDPYROPHOSPHATE(SAPP) Molecularformula::Na2H2P2O7 MolecularWeight:221.95 Properties:Whitecrystalpowder;Relativedensity1.86. CASNo.:7758-16-9 Uses:Mainlyusedinfoodindustryasfoodadditive. Packing:Packedin25kgnetWPP/PEbags. TechnicalSpecifications: Indexes FoodGrade Appearance Whitepowder Assay(asNa2H2P2O7)% 95.0 PHValue 3.5-4.5 WaterInsolublematter% 1.0 Fluoride(asF)% 0.005 HeavyMetals(asPb)% 0.002 Arsenic(As)%= 0.0003 Mail：minichem@hotmail.com/millysm@163.com Tel：868382222376 Web：www.cxchem.net