Designation:D5440−17(Reapproved2021)StandardTestMethodforDeterminingtheMeltingPointofFatsandOils1ThisstandardisissuedunderthefixeddesignationD5440;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedtodeterminethemeltingpointofallnormalanimalandvegetablefatsandoils.ThistestmethodwasderivedfromALCAH-16.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:E2251SpecificationforLiquid-in-GlassASTMThermom-eterswithLow-HazardPrecisionLiquids2.2AmericanLeatherChemistsAssociationStandard:ALCAH-16MeltingPoint23.SignificanceandUse3.1Thistestmethodisintendedtodeterminethemeltingpointofallnormalanimalandvegetablefats.3.2Thenaturalfatsandoils,thatis,thoseofanimalandvegetableorigin,aremixturesofglyceridesandothersub-stancesandconsistofanumberofcomponents.Theydonotexhibiteitheradefiniteorsharpmeltingpoint.Fatspassthroughastageofgradualsofteningbeforetheybecomecompletelyliquid.Themeltingpointthenshallbedefinedbythespecificconditionsofthemethodbywhichitisdeterminedand,inthiscase,itshallbethetemperatureatwhichthesamplebecomesperfectlyclearandliquid.4.Apparatus4.1MeltingPointTubes,capillaryglobetubing,withaninsidediameterof1mma...
