1、Designation:D795120Standard Specification forDisproportionation(TDP)Toluene1This standard is issued under the fixed designation D7951;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses i
2、ndicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers Disproportionation(TDP)toluene.1.2 The following applies to all specified limits in thisspecification:for purposes of determining confor
3、mance withthis specification,an observed value or a calculated value shallbe rounded off“to the nearest unit”in the last right-hand digitused in expressing the specification limit,in accordance withthe rounding-off method of Practice E29.1.3 The values stated in SI units are to be regarded asstandar
4、d.No other units of measurement are included in thisstandard.1.4 Consult current OSHA regulations,suppliers SafetyData Sheets,and local regulations for all materials used in thisspecification.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is
5、 theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on stand
6、ard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D848 Test Method for Acid Wash Color of Industrial
7、 Aro-matic HydrocarbonsD849 Test Method for Copper Strip Corrosion by IndustrialAromatic HydrocarbonsD3437 Practice for Sampling and Handling Liquid CyclicProductsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD5386 Test Method for Color of Liquids U
8、sing TristimulusColorimetryD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7184 Test Method for Ultra Low Nitrogen in AromaticHydrocarbons by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD7360 Test
9、Method for Analysis of Benzene by Gas Chro-matography with External CalibrationD7504 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography andEffective Carbon NumberD8005 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)E29 Practice for Using Significa
10、nt Digits in Test Data toDetermine Conformance with SpecificationsE2680 Test Method for Appearance of Clear,TransparentLiquids(Visual Inspection Procedure)2.2 Other Documents:3OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.12003.Properties3.1 Disproportionation toluene shall conform to the fol
11、low-ing requirements:PropertySpecificationASTMTest MethodAPurity,min,mass%95.0D7504Benzene,max,mass%0.1D7504Impurities eluting afterOrthoxylene,max,mass%0.1D75041,4-Dioxane,max,mg/kg10D7504Nonaromatic hydrocarbons,max,mass%2.5D7504Sulfur,max,mg/kg1D7183Acid wash color,maxpass with 2D8481This specifi
12、cation is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.01 on Benzene,Toluene,Xylenes,Cyclohexane andTheir Derivatives.Current edition approved July 15,2020.Published July 2020.Originallyapprov
13、ed in 2014.Last previous edition approved in 2019 as D7951 19.DOI:10.1520/D7951-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page on
14、the ASTM website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international s
15、tandard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.Proper
16、tySpecificationASTMTest MethodACopper corrosionpass(1A or1B)D849Appearance,free of haze,particulates or suspendedmatter particlespassE2680Color,Pt/Co scale,max20D5386 or D8005Relative density,15.56/15.56 C0.869 to0.873D4052Total Nitrogen,max,mg/kg1.0D7184Methylcyclohexane,max,mg/kg 100D7504AIf more than one method is listed for a property the producer and user shall agreeon the reference method.4.Sampling4.1 The material shall be sampled in accordance withPractice D3437.5.Keywords5.1 tolueneASTM
