Designation:D1387−89(Reapproved2019)StandardTestMethodforSaponificationNumber(Empirical)ofSyntheticandNaturalWaxes1ThisstandardisissuedunderthefixeddesignationD1387;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthesaponi-ficationnumberofsyntheticwaxesandnaturalwaxes.1.2ThistestmethodisapplicabletoFischerTropsche,microcrystalline,polyethylene,andMontanEsterwaxes.1.3Certainsyntheticwaxes,notablycopolymersofethylene,exhibitpoorreproducibilitywhenrunningsaponifi-cationvalues.Reproducibilitycanbeimprovedifcookingtimein7.2isextendedfrom3hto18–20h.1.4Someoxidizedpolyethyleneandotherwaxeswithamelttemperatureabove100°Cmaygivepoorreproducibility.1.5Somedark-colored(GardnerColor14)waxesmayobscurethecolorchangeoftheindicator,resultinginpoorreproducibility.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2E200PracticeforPreparation,Standardization,andStorageofStandardandReagentSolutionsforChemicalAnalysis3.Terminology3.1Definitions:3.1.1saponificationnumber—thenumberofmilligramsofpotassiumhydroxiderequiredtohydrolyze1gofthesampleandisameasureoftheamountofsaponifiablematterpresent.4.Significancea...
