Designation:D5211−19StandardSpecificationforXylenesforp-XyleneFeedstock1ThisstandardisissuedunderthefixeddesignationD5211;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversxylenesforp-xylenefeed-stock.Thesexylenestypicallyareextractedfromreformate.1.2Thefollowingappliestoallspecifiedlimitsinthisspecification:forpurposesofdeterminingconformancewiththisspecification,anobservedvalueorcalculatedvalueshallberoundedoff“tothenearestunit”inthelastrighthanddigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4ConsultcurrentOSHAregulations,suppliers’SafetyDataSheets(SDS),andlocalregulationsforallmaterialsusedinthisspecification.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D850TestMethodforDistillationofIndustrialAromaticHydrocarbonsandRelatedMaterialsD3437PracticeforSamplingandHandlingLiquidCyclicProductsD5194TestMethodforTraceChlorideinLiquidAromaticHydrocarbonsD5386TestMethodforColorofLiquidsUsingTristimulusColorimetryD5808TestMethodforDeterminingChlorideinAromaticHydrocarbonsandRelatedChemicalsbyMicrocoulom-etryD5917TestMethodforTraceImpuritiesinMonocyclicAromaticHydrocarbonsbyGasChromatographyandExternalCalibrationD7183TestMethodforDeterminationofTotalSulfurinAromaticHydrocarbonsandRelatedChemicalsbyUltra-violetFluorescenceD7184TestMethodforUltraLowNitrogeninAromaticHydrocarbonsbyOxidativeCombustionandReducedPress...
