Designation:D5309−22StandardSpecificationforCyclohexane9991ThisstandardisissuedunderthefixeddesignationD5309;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversagradeofcyclohexaneiden-tifiedas“cyclohexane999.”1.2Thefollowingappliestoallspecifiedlimitsinthisstandard:forpurposesofdeterminingconformancewiththisstandard,anobservedvalueoracalculatedvalueshallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.3ConsultcurrentOSHAregulations,supplier’sSafetyDataSheets,andlocalregulationsforallmaterialsusedinthisspecification.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D850TestMethodforDistillationofIndustrialAromaticHydrocarbonsandRelatedMaterialsD3437PracticeforSamplingandHandlingLiquidCyclicProductsD5386TestMethodforColorofLiquidsUsingTristimulusColorimetryD7183TestMethodforDeterminationofTotalSulfurinAromaticHydrocarbonsandRelatedChemicalsbyUltra-violetFluorescenceD7266TestMethodforAnalysisofCyclohexanebyGasChromatography(ExternalStandard)D7871TestMethodforAnalysisofCyclohexanebyGasChromatography(EffectiveCarbonNumber)D8005TestMethodforColorofClearLiquids(Platinum-CobaltScale)E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE2680TestMethodforAppearanceofClear,TransparentLiquids(VisualInspectionProcedure)2.2OtherDocuments:OSHARegulations,29CFRParagraphs1910.1000and1910.120033.Properties3.1Cyclohexane999shallconformtothefollo...
