Designation:D2379−09StandardTestMethodforAcidityofFormaldehydeSolutions1ThisstandardisissuedunderthefixeddesignationD2379;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationoftheacidityofcommerciallyavailableformaldehydesolutions.1.2Forpurposesofdeterminingconformanceofanob-servedoracalculatedvalueusingthistestmethodtorelevantspecifications,testresult(s)shallberoundedoff“tothenearestunit”inthelastright-handdigitusedinexpressingthespecificationlimit,inaccordancewiththerounding-offmethodofPracticeE29.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection7.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD2380TestMethodforMethanolContentofFormaldehydeSolutionsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE200PracticeforPreparation,Standardization,andStorageofStandardandReagentSolutionsforChemicalAnalysis3.SummaryofTestMethod3.1Aspecimenistitratedwithstandardalkalitothebromthymolblueendpoint.4.SignificanceandUse4.1Thistestmethodprovidesameasurementofacidity(asformicacid)informaldehydesolutions.Theresultsofthesemeasurementscanbeusedforspecificationacceptance.5.Apparatus5.1Buret,25-mL,calibratedin0.1-mLdivisions.ATFE-fluorocarbonresinstopcockissuitableforthispurpose.6.ReagentsandMaterials6.1PurityofReagents—Reagentgradechemicalsshallbeusedinalltests.Unle...
