Designation:D612−88(Reapproved2017)StandardTestMethodforCarbonizableSubstancesinParaffinWax1ThisstandardisissuedunderthefixeddesignationD612;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversdeterminationofcarbonizablesubstancesinparaffinwax.Thetestmethodisapplicabletoparaffinwaxforpharmaceuticaluse,asdefinedbytheU.S.NationalFormulary,withameltingpointasdeterminedinaccordancewithTestMethodD87,between117°Fand149°F(47°Cand65°C).1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecificwarningstatementsaregiveninAnnexA1.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D87TestMethodforMeltingPointofPetroleumWax(CoolingCurve)D1193SpecificationforReagentWater3.SummaryofTestMethod3.1Fivemillilitresofmeltedwaxaretreatedwith5mLofconcentrated,nitrogen-freesulfuricacidat158°F(70°C).Thecoloroftheacidlayeriscomparedwiththatofacolorimetricreferencestandard.Ifthecolorisnotdarkerthanthestandard,thewaxisreportedaspassingthetest.4.SignificanceandUse4.1Thistestmethodisameansforascertainingwhetherpharmaceuticalparaffinwaxconformstothe...
