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ASTM D7951-18

(Specification)

Standard Specification for Disproportionation (TDP) Toluene

Standard Specification for Disproportionation (TDP) Toluene

SCOPE
1.1 This specification covers Disproportionation (TDP) toluene.  
1.2 The following applies to all specified limits in this specification: for purposes of determining conformance with this specification, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 Consult current OSHA regulations, supplier’s Safety Data Sheets, and local regulations for all materials used in this specification.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Historical
Publication Date
31-May-2018
ICS
71.040.50 - Physicochemical methods of analysis
71.080.15 - Aromatic hydrocarbons
Technical Committee
D16 - Aromatic, Industrial, Specialty and Related Chemicals
Drafting Committee
D16.01 - Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives
Current Stage
Ref Project

Relations

Replaces
ASTM D7951-17 - Standard Specification for Disproportionation (TDP) Toluene
Effective Date
01-Jun-2018
Replaced By
ASTM D7951-19 - Standard Specification for Disproportionation (TDP) Toluene
Effective Date
01-Nov-2019

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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7951 −18
Standard Specification for
1
Disproportionation (TDP) Toluene
This standard is issued under the fixed designation D7951; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Aromatic Hydrocarbons
D850 Test Method for Distillation of Industrial Aromatic
1.1 This specification covers Disproportionation (TDP)
Hydrocarbons and Related Materials
toluene.
D1209 Test Method for Color of Clear Liquids (Platinum-
1.2 The following applies to all specified limits in this
Cobalt Scale)
specification: for purposes of determining conformance with
D2360 Test Method for Trace Impurities in Monocyclic
this specification, an observed value or a calculated value shall
Aromatic Hydrocarbons by Gas Chromatography (With-
be rounded off “to the nearest unit” in the last right-hand digit
3
drawn 2016)
used in expressing the specification limit, in accordance with
D3437 Practice for Sampling and Handling Liquid Cyclic
the rounding-off method of Practice E29.
Products
1.3 The values stated in SI units are to be regarded as
D4052 Test Method for Density, Relative Density, and API
standard. No other units of measurement are included in this
Gravity of Liquids by Digital Density Meter
standard.
D4492 Test Method for Analysis of Benzene by Gas Chro-
3
1.4 Consult current OSHA regulations, supplier’s Safety
matography (Withdrawn 2018)
Data Sheets, and local regulations for all materials used in this
D5386 Test Method for Color of Liquids Using Tristimulus
specification.
Colorimetry
1.5 This standard does not purport to address all of the
D6526 Test Method for Analysis of Toluene by Capillary
3
safety concerns, if any, associated with its use. It is the
Column Gas Chromatography (Withdrawn 2018)
responsibility of the user of this standard to establish appro-
D7183 Test Method for Determination of Total Sulfur in
priate safety, health, and environmental practices and deter-
Aromatic Hydrocarbons and Related Chemicals by Ultra-
mine the applicability of regulatory limitations prior to use.
violet Fluorescence
1.6 This international standard was developed in accor-
D7184 Test Method for Ultra Low Nitrogen in Aromatic
dance with internationally recognized principles on standard-
Hydrocarbons by Oxidative Combustion and Reduced
ization established in the Decision on Principles for the
Pressure Chemiluminescence Detection
Development of International Standards, Guides and Recom-
D7360 Test Method for Analysis of Benzene by Gas Chro-
mendations issued by the World Trade Organization Technical
matography with External Calibration
Barriers to Trade (TBT) Committee.
D7504 Test Method for Trace Impurities in Monocyclic
Aromatic Hydrocarbons by Gas Chromatography and
2. Referenced Documents
Effective Carbon Number
2
2.1 ASTM Standards:
E29 Practice for Using Significant Digits in Test Data to
D848 Test Method for Acid Wash Color of Industrial Aro-
Determine Conformance with Specifications
matic Hydrocarbons
E2680 Test Method for Appearance of Clear, Transparent
D849 Test Method for Copper Strip Corrosion by Industrial
Liquids (Visual Inspection Procedure)
4
2.2 Other Documents:
1
This specification is under the ju
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7951 − 17 D7951 − 18
Standard Specification for
1
Disproportionation (TDP) Toluene
This standard is issued under the fixed designation D7951; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers Disproportionation (TDP) toluene.
1.2 The following applies to all specified limits in this specification: for purposes of determining conformance with this
specification, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand digit used
in expressing the specification limit, in accordance with the rounding-off method of Practice E29.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 Consult current OSHA regulations, supplier’s Safety Data Sheets, and local regulations for all materials used in this
specification.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D848 Test Method for Acid Wash Color of Industrial Aromatic Hydrocarbons
D849 Test Method for Copper Strip Corrosion by Industrial Aromatic Hydrocarbons
D850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related Materials
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
3
D2360 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography (Withdrawn 2016)
D3437 Practice for Sampling and Handling Liquid Cyclic Products
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
3
D4492 Test Method for Analysis of Benzene by Gas Chromatography (Withdrawn 2018)
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
3
D6526 Test Method for Analysis of Toluene by Capillary Column Gas Chromatography (Withdrawn 2018)
D7183 Test Method for Determination of Total Sulfur in Aromatic Hydrocarbons and Related Chemicals by Ultraviolet
Fluorescence
D7184 Test Method for Ultra Low Nitrogen in Aromatic Hydrocarbons by Oxidative Combustion and Reduced Pressure
Chemiluminescence Detection
D7360 Test Method for Analysis of Benzene by Gas Chromatography with External Calibration
D7504 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon
Number
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E2680 Test Method for Appearance of Clear, Transparent Liquids (Visual Inspection Procedure)
1
This specification is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility of
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.
Current edition approved June 1, 2017June 1, 2018. Published June 2017June 2018. Originally approved in 2014. Last previous edition approved in 20142017 as D7951
– 14.17. DOI: 10.1520/D7951-17.10.1520/D7951-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7951 − 18
4
2.2 Other Documents:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
3. Properties
3.1 Disproportionation toluene shall conform to the following requirements:
ASTM
Property Specification
A
Test Method
Purity, min, wt% 95.0
...

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ABSTRACT
This specification establishes requirements for disproportionation (TDP) toluene. For purposes of determining conformance with this specification, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit. This specification covers properties and sampling of the material.
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1.1 This specification covers Disproportionation (TDP) toluene.  
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1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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SIGNIFICANCE AND USE
5.1 Determining the type and amount of hydrocarbon impurities remaining from the manufacture of toluene, mixed xylenes, and p-xylenes used as chemical intermediates and solvents is often required. This test method is suitable for setting specifications and for use as an internal quality control tool where these products are produced or are used. Typical impurities are: alkanes containing 1 to 10 carbons atoms, benzene, toluene, ethylbenzene (EB), xylenes, and aromatic hydrocarbons containing nine carbon atoms.  
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Standard Specification for Disproportionation (TDP) Toluene

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