Designation:D595–85(Reapproved1997)StandardSpecificationforTetrasodiumPyrophosphate(Anhydrous)1ThisstandardisissuedunderthefixeddesignationD595;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationfortetrasodiumpyrophosphate(anhy-drous)coversmaterialsuitableforvariouswashing,cleaning,andscouringprocesses,withsoaporotherdetergentswhereamildlyalkalinematerial,withappreciablewatersofteningproperties,isdesired.1.2Thismaterialmaybehazardousifnotproperlyman-aged.1.3Precautionaryinformationforthesafeuse,storage,anddisposalofthismaterialshouldbepreliminarilyobtainedfromsuppliersandothers.1.4Incaseofpersonalaccidentwiththismaterial,applyappropriatefirstaid;telephonethenearestPoisonControlCenterforassistance,andgetmedicalattentionimmediately.2.ReferencedDocuments2.1ASTMStandards:D501TestMethodsofSamplingandChemicalAnalysisofAlkalineDetergents23.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1Tetrasodiumpyrophosphate(anhydrous)shallbeawhite,uniformproductineithergranular,powdered,orflakeform,asspecifiedbythepurchaser.4.OrderingInformation4.1Tetrasodiumpyrophosphate(anhydrous)shallbepur-chasedbynetweight.When,however,duetohygroscopicitythetetrasodiumpyrophosphatecontentislessthan97.5%,acorrespondinggaininweightofthepackageshallbeexpected,andthenetweightshallbebasedonaproductcontaining97.5%oftetrasodiumpyrophosphate.Thenetweightofthematerialtobepaidforshallbecalculatedasfollows:W5~R3T!/97.5(1)where:W5weightofthematerialtobepaidfor,R5netweightofmaterialasreceived,andT5totaltetrasodiumpyrophosphatecalculatedaspercent-ageofNa4P2O7.4.2Intheeventthatthecalculationunder4.1resultsinafiguregreaterthan100%,thesellerwaivestherighttoinvoicethepurchaserforanyamountinexcessof100%.5.ChemicalComposition5.1Tetrasodiumpyrophosphate(anhydrous),asreceived,...
