Designation:D6660−01(Reapproved2019)StandardTestMethodforFreezingPointofAqueousEthyleneGlycolBaseEngineCoolantsbyAutomaticPhaseTransitionMethod1ThisstandardisissuedunderthefixeddesignationD6660;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthefreez-ingpointofanaqueousenginecoolantsolution.1.2Thistestmethodisdesignedtocoverethyleneglycolbasecoolantsuptoamaximumconcentrationof60%(v⁄v)inwater;however,theASTMinterlaboratorystudymentionedin12.2hasonlydemonstratedthetestmethodwithsampleshavingaconcentrationrangeof40to60%(v/v)water.NOTE1—Wheresolutionsofspecificconcentrationsaretobetested,theyshallbepreparedfromrepresentativesamplesasdirectedinPracticeD1176.Secondaryphasesseparatingondilutionneednotbeseparated.NOTE2—Theproductsmayalsobemarketedinaready-to-useform(prediluted).1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Somespecifichazardsstatementsaregivenin7.3.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1176PracticeforSamplingandPreparingAqueousSolu-tionsofEngineCoolantsorAntirustsforTestingPurposesD1177TestMethodforFreezingPointofAqueousEngineCoolantsD3306SpecificationforGlycolBaseEngineCoolantforAutomobileandLight-DutyServi...
