1、Designation:D718512Standard 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.Scope*1.1 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 unit
4、s are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 Consult current OSHA regulations,suppliers MaterialSafety Data Sheets,and local regulations for all materials usedin this specification.2.Referenced Documents2.1 ASTM Standards:2D848 Test Method for Acid
5、Wash Color of Industrial Aro-matic HydrocarbonsD852 Test Method for Solidification Point of BenzeneD1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D1685 Test Method for Traces of Thiophene in Benzene bySpectrophotometry(Withdrawn 2009)3D3437 Practice for Sampling and Handling Liqu
6、id CyclicProductsD4492 Test Method for Analysis of Benzene by Gas Chro-matographyD4735 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas ChromatographyD5194 Test Method for Trace Chloride in Liquid AromaticHydrocarbonsD5386 Test Method for Color of Liquids Using TristimulusCo
7、lorimetryD5808 Test Method for Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD6069 Test Method for Trace Nitrogen in Aromatic Hydro-carbons by Oxidative Combustion and Reduced PressureChemiluminescence DetectionD6304 Test Method for Determination of Water in P
8、etro-leum Products,Lubricating Oils,and Additives by Cou-lometric Karl Fischer TitrationD6875 Test Method for Solidification Point of IndustrialOrganic Chemicals by ThermistorD7011 Test Method for Determination of Trace Thiophenein Refined Benzene by Gas Chromatography and SulfurSelective DetectionD
9、7183 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 DetectionD7359 Test Method for Total Fluorine,Ch
10、lorine and Sulfurin Aromatic Hydrocarbons and Their Mixtures by Oxida-tive Pyrohydrolytic Combustion followed by Ion Chroma-tography Detection(Combustion Ion Chromatography-CIC)D7360 Test Method for Analysis of Benzene by Gas Chro-matography with External CalibrationD7375 Test Method for Trace Quant
11、ities of Water in Aro-matic Hydrocarbons and Their Mixtures by CoulometricKarl Fischer TitrationD7457 Test Method for Determining Chloride in AromaticHydrocarbons and Related Chemicals by Microcoulom-etryD7504 Test Method for Trace Impurities in MonocyclicAromatic Hydrocarbons by Gas Chromatography
12、andEffective Carbon NumberD7536 Test Method for Chlorine in Aromatics by Mono-chromatic Wavelength Dispersive X-ray FluorescenceSpectrometry1This specification is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommitte
13、e D16.01 on Benzene,Toluene,Xylenes,Cyclohexane and TheirDerivatives.Current edition approved Nov.1,2012.Published December 2012.Originallyapproved in 2006.Last previous edition approved in 2011 as D7185 11a.DOI:10.1520/D7185-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orco
14、ntact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of t
15、his standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE1064 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer Titr
16、ation2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120043.Properties3.1 Low Toluene Low Dioxane(LTLD)Benzene shallconform to the following requirements:PropertySpecificationASTM TestMethodAPurity,min,weight%99.80D4492 or D7360 orD7504Toluene,max,weight%0.05D4492 or D7360 orD7504Thiophene,max,mg/kg1.0D1685 or D4735 orD7011Nonaromatic hydrocarbons,max,weight%0.15D4492 or D7360 orD7504Acid wash color,maxpass with 1D848AppearanceB.Color,max,PtCo scale20D1209 or D53861,4 Dio