Designation:D1786−21StandardSpecificationforTolueneDiisocyanate1ThisstandardisissuedunderthefixeddesignationD1786;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstoluenediisocyanateusedasaningredientintheproductionofpolyurethanematerials.NOTE1—Thepropertiesincludedinthisspecificationarethoserequiredtocharacterizetoluenediisocyanate.Otherrequirementsarepossibleandwillbeaddedasthenecessarytestmethodsbecomeavailable.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE2—ThereisnoknownISOequivalenttothisstandard.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD4660TestMethodsforPolyurethaneRawMaterials:De-terminationoftheIsomerContentofToluenediisocyanateD4661TestMethodsforPolyurethaneRawMaterials:De-terminationofTotalChlorineinIsocyanatesD4663TestMethodforPolyurethaneRawMaterials:Deter-minationofHydrolyzableChlorineofIsocyanatesD4877TestMethodforPolyurethaneRawMaterials:Deter-minationofAPHAColorinIsocyanatesD5155TestMethodsforPolyurethaneRawMaterials:De-terminationoftheIsocyanateContentofAromaticIsocya-natesD5629TestMethodforPolyurethaneRawMaterials:Deter-minationofAcidityinLow-AcidityAromaticIsocyanatesandPolyurethanePrepolymers2.2FederalStandard:49CFRTransportationPart172.0133.Terminology3.1Definitions—Fordefinitio...
