Designation:D1686−10StandardTestMethodforColorofSolidAromaticHydrocarbonsandRelatedMaterialsintheMoltenState(Platinum-CobaltScale)1ThisstandardisissuedunderthefixeddesignationD1686;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthevisualmeasurementofthecolorofthermallystablesolidsmeltingbelow150°C.Itisapplicableonlytomaterialsinwhichthecolor-producingbodiespresenthavelightabsorptioncharacteristicsquitesimi-lartothoseofthestandardsused.1.2Indeterminingtheconformanceofthetestresultsusingthismethodtoapplicablespecifications,resultsshallberoundedoffinaccordancewiththerounding-offmethodofPracticeE29.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.ForspecifichazardstatementsseeSections7and9.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD3438PracticeforSamplingandHandlingNaphthalene,MaleicAnhydride,andPhthalicAnhydrideD3852PracticeforSamplingandHandlingPhenol,Cresols,andCresylicAcidD6809GuideforQualityControlandQualityAssuranceProceduresforAromaticHydrocarbonsandRelatedMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications2.2OtherDocument:OSHARegulations,29CFRparagraphs1910.1000and1910.120033.SignificanceandUse3.1Colorbythistestmethodisameasureofcolor-producingimpuritiespresentinthethermallystablesolids.Thistestmethodissuitableforsettingspecificationsandforuseasaninternalqualitycontroltool.4.Apparatus4.1ColorComparisonTubes—Matched100-mL,tall-formNesslertubes,providedwith...
