Designation:D3845–96(Reapproved2000)StandardSpecificationforGlacialMethacrylicAcid1ThisstandardisissuedunderthefixeddesignationD3845;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversglacialmethacrylicacid(98.5%grade)foruseinpaint,varnish,lacquer,andrelatedproducts.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.3Forhazardinformationandguidance,seethesupplier’sMaterialSafetyDataSheet.2.ReferencedDocuments2.1ASTMStandards:D1209TestMethodforColorofClearLiquids(Platinum-CobaltScale)2D1364TestMethodforWaterinVolatileSolvents(KarlFischerReagentTitrationMethod)2D3125TestMethodforMonomethylEtherofHydro-quinoneinColorlessMonomericAcrylateEstersandAcrylicAcid2E300PracticeforSamplingIndustrialChemicals3E301TestMethodforTotalAcidityofOrganicAcids32.2U.S.FederalSpecification:PPP-C-2020Chemicals,Liquid,Dry,andPaste:Packagingof43.Properties3.1Glacialmethacrylicacidshallconformtothefollowingrequirements.Assay,fromtotalaciditybytitration,weight%,min98.5Water,weight%,max0.30Color,Pt-Coscale,max25Inhibitor,methyletherofhydroquinoneA______________AAsagreeduponbetweenthepurchaserandthemanufacturer.4.Sampling4.1SamplethematerialinaccordancewithPracticeE300.Usebrownglasssamplebottlesandprotectsamplesfromlightandheatatalltimes.5.TestMethods5.1ThepropertiesenumeratedinthisspecificationshallbedeterminedinaccordancewiththefollowingASTMmethods:5.1.1Assay,fromTotalAciditybyTitration—TestMethodE301.Themolecularweightofmethacrylicacidis86.09andithasonereactinggroup.5.1.2Water—TestMethodD1364.5.1.3Color—TestMethodD1209.5.1.4Inhibitor—TestMethodD3125.6.Packaging...
