Designation:D632−12StandardSpecificationforSodiumChloride1ThisstandardisissuedunderthefixeddesignationD632;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverssodiumchlorideintendedforuseasadeicerandforroadconstructionormaintenancepurposes.1.2ThevaluesstatedasSIunitsaretoberegardedasthestandard.1.3Forpurposesofdeterminingconformancetothisspecification,valuesforchemicalanalysisshallberoundedtothenearest0.1%,andvaluesforgradingshallberoundedtothenearest1%,inaccordancewiththeroundingmethodinPracticeE29E29.1.4Thetextofthisspecificationreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotesshallnotbeconsideredasrequirementsofthespecification.1.5ThefollowingprecautionarycaveatpertainsonlytothetestmethodinAnnexA1,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:C136TestMethodforSieveAnalysisofFineandCoarseAggregatesC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE287SpecificationforLaboratoryGlassGraduatedBuretsE288SpecificationforLaboratoryGlassVolumetricFlasksE534TestMethodsforChemicalAnalysisofSodiumChlo-ride3.Classification3.1Thisspecificationcoverssodiumchlorideobtainedfromnaturaldeposits(rocksalt)orproducedbyman(evaporated,solar,other)andrecognizestwotypesandtwogradesasfollows:3.1.1TypeI—Usedprimarilyasapavementdeicerorinaggregatestabilization.3.1.1.1Grade1—Standardgrading(Note1).3.1.1.2Grade2—Specialgrading(Note1).3.1.2TypeII—Usedinagg...
