1、Designation:D718519Standard Specification forLow Toluene Low Dioxane(LTLD)Benzene1This standard is issued under the fixed designation D7185;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 parenth
2、eses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers a grade of benzene known asLow Toluene Low Dioxane(LTLD)Benzene.1.2 The following applies to all specified limits in thisstandard:
3、for purposes of determining conformance with thisstandard,an observed value or a calculated value shall berounded 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
4、 are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 Consult current OSHA regulations,suppliers SafetyData Sheets,and local regulations for all materials used in thisspecification.1.5 This international standard was developed in accor-dance with internationa
5、lly recognized principles on standard-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
6、 for Acid Wash Color of Industrial Aro-matic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD3437 Practice for Sampling and Handling Liquid CyclicProductsD4735 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas ChromatographyD5194 Test Method for Trace Chlorid
7、e in Liquid AromaticHydrocarbonsD5386 Test Method for Color of Liquids Using TristimulusColorimetryD5808 Test Method for Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD6875 Test Method for Solidification Point of IndustrialOrganic Chemicals by ThermistorD7011
8、Test Method for Determination of Trace Thiophenein Refined Benzene by Gas Chromatography and SulfurSelective DetectionD7183 Test Method for Determination of Total Sulfur inAromatic Hydrocarbons and Related Chemicals by Ultra-violet FluorescenceD7184 Test Method for Ultra Low Nitrogen in AromaticHydr
9、ocarbons by Oxidative Combustion and ReducedPressure Chemiluminescence DetectionD7359 Test Method for Total Fluorine,Chlorine and Sulfurin Aromatic Hydrocarbons and Their Mixtures by Oxida-tive Pyrohydrolytic Combustion followed by Ion Chroma-tography Detection(Combustion Ion Chromatography-CIC)D736
10、0 Test Method for Analysis of Benzene by Gas Chro-matography with External CalibrationD7457 Test Method for Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD7504 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography andEffecti
11、ve Carbon NumberD7536 Test Method for Chlorine in Aromatics by Mono-chromatic Wavelength Dispersive X-ray FluorescenceSpectrometryD8005 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE1064
12、 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer TitrationE2680 Test Method for Appearance of Clear,TransparentLiquids(Visual Inspection Procedure)1This specification is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is th
13、e direct responsi-bility of Subcommittee D16.01 on Benzene,Toluene,Xylenes,Cyclohexane andTheir Derivatives.Current edition approved Nov.1,2019.Published November 2019.Originallyapproved in 2006.Last previous edition approved in 2017 as D7185 17.DOI:10.1520/D7185-19.2For referenced ASTM standards,vi
14、sit 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 onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.Unit
15、ed StatesThis international standard 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
16、to Trade(TBT)Committee.1 2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Properties3.1 Low Toluene Low Dioxane(LTLD)Benzene shallconform to the following requirements:PropertySpecificationASTM TestMethodAPurity,min,mass%99.80D7360 or D7504Toluene,max,mass%0.05D7360 or D7504Thiophene,max,mg/kg1.0D4735 or D7011Nonaromatic hydrocarbons,max,mass%0.15D7360 or D7504Acid wash color,maxpass with 1D848Appearance,free of haze,particulates or suspendedmatter particlespassE268
