Designation:D8235−21StandardSpecificationforEthylTertiary-ButylEther(ETBE)forBlendingwithGasolinesforUseasAutomotiveSpark-IgnitionEngineFuel1ThisstandardisissuedunderthefixeddesignationD8235;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversrequirementsforfuelgradeethyltertiary-butylether(ETBE)utilizedasablendcomponentatthe1%to22%byvolumeforuseasautomotivespark-ignitionenginefuelcoveredbySpecificationsD4814andD8076aswellasotherautomotivefuelapplicationsinvolvingETBE.1.1.1OtherETBEgradesmaybeavailableforblendingthatarenotcoveredbythisspecification.SpecificationD7618isalsoavailablefromASTMInternational.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thefollowingappliestoallspecifiedlimitsinthisstandard:Forpurposesofdeterminingconformancewiththesespecifications,anobservedvalueoracalculatedvalueshallberounded“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththeroundingmethodofPracticeE29.Alldigitsexpressedinthespecificationlimitsaretobeconsideredsignificantdigits.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D130TestMethodforCorrosivenesstoCopperfromPetro-leumProductsbyCopperStripTestD156TestMethodfo...
