... /Food Grade 4.Passed ISO9001:2000 5.Tel:86-13783524876 Sodium Pyrophosphate Usage: 1.Used as water-softener,boiler scale remover, ... used as buffering agent,emulaifer,nutrition ingredients and quality improver.Sodium Pyrophosphate Properties:White powder,soluble in water but insoluble in ... melting point:880.Deliquescent in the open air.Its aqueous solution shows weak alkalinity and is stalbe at 70 but ...