Designation:D5606−19StandardSpecificationforTolueneforTolueneDiisocyanate(TDI)Feedstock1ThisstandardisissuedunderthefixeddesignationD5606;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstoluenefortoluenediisocya-nate(TDI)feedstock.1.2Thefollowingappliestoallspecifiedlimitsinthisspecification:forpurposesofdeterminingconformancewiththisspecification,anobservedvalueoracalculatedvalueshallberoundedofftothenearestunitinthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.3ConsultOSHAregulationsandsupplier’sSafetyDataSheetsforallmaterialsusedinthisspecification.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D848TestMethodforAcidWashColorofIndustrialAro-maticHydrocarbonsD3437PracticeforSamplingandHandlingLiquidCyclicProductsD5386TestMethodforColorofLiquidsUsingTristimulusColorimetryD7504TestMethodforTraceImpuritiesinMonocyclicAromaticHydrocarbonsbyGasChromatographyandEffectiveCarbonNumberD8005TestMethodforColorofClearLiquids(Platinum-CobaltScale)E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE2680TestMethodforAppearanceofClear,TransparentLiquids(VisualInspectionProcedure)2.2OtherDocument:OSHARegulations,29CFRparagraphs1910.1000and1910.120033.Properties3.1TolueneforTDIfeedstockshallconformtothefollow-ingrequirements:PropertySpecificationASTMTestMethodAPurity,min,...
