ASTM D7951-20
(Specification)Standard Specification for Disproportionation (TDP) Toluene
Standard Specification for Disproportionation (TDP) Toluene
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.
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
- Published
- Publication Date
- 14-Jul-2020
- Technical Committee
- D16 - Aromatic, Industrial, Specialty and Related Chemicals
- Drafting Committee
- D16.01 - Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives
Relations
- Effective Date
- 01-Nov-2023
- Effective Date
- 01-Jun-2020
- Effective Date
- 01-Jun-2019
- Effective Date
- 01-Jun-2019
- Effective Date
- 01-Nov-2018
- Effective Date
- 01-Jun-2017
- Effective Date
- 01-Apr-2017
- Refers
ASTM D849-15 - Standard Test Method for Copper Strip Corrosion by Industrial Aromatic Hydrocarbons - Effective Date
- 01-Oct-2015
- Effective Date
- 01-Jul-2015
- Effective Date
- 01-Jul-2015
- Effective Date
- 01-Jun-2015
- Effective Date
- 01-Jun-2015
- Effective Date
- 01-Jun-2015
- Effective Date
- 01-Feb-2014
- Effective Date
- 01-Jul-2013
Overview
ASTM D7951-20 is the standard specification for Disproportionation (TDP) Toluene, published by ASTM International. This specification outlines the essential criteria for the purity, properties, sampling, and analytical methods required for TDP toluene intended for industrial applications. TDP toluene is an important aromatic hydrocarbon used in chemical synthesis and industrial manufacturing. Adherence to this standard ensures reliable quality, regulatory compliance, and safety in the supply chain.
Key Topics
Scope and Applicability
- ASTM D7951-20 applies specifically to Disproportionation (TDP) Toluene.
- Values are stated in SI units, with no alternative units permitted.
- The document instructs that test results must be rounded to the nearest unit according to Practice E29.
Physical and Chemical Requirements
- TDP toluene must meet minimum and maximum property specifications as determined by referenced ASTM test methods.
- Required properties include:
- Purity, benzene content, nonaromatic hydrocarbons, sulfur, and nitrogen levels.
- Appearance, color (Pt/Co scale), and relative density.
- Acid wash color and copper strip corrosion performance.
Sampling and Analysis
- Samples must be collected according to ASTM Practice D3437 to ensure consistency in quality assurance.
- Multiple ASTM methods are referenced for analysis, such as:
- D7504 for trace impurities and purity
- D4052 for relative density
- D848 and D849 for acid wash color and corrosion
Safety and Compliance
- Users must consult current OSHA regulations, Safety Data Sheets, and relevant local regulations.
- The standard highlights the user's responsibility to establish safety, health, and environmental practices.
Applications
TDP toluene conforming to ASTM D7951-20 is critical for sectors that require precise material specifications, including:
- Chemical Manufacturing
- Used as a feedstock for synthesizing other aromatic compounds and chemical intermediates.
- Industrial Solvents
- Acts as a high-purity solvent in the production of coatings, adhesives, and specialty chemicals.
- Quality Assurance in Distribution
- Ensures uniformity and reliability for suppliers and users in the chemical supply chain.
- Regulatory Compliance
- Meeting ASTM D7951-20 helps organizations comply with local and global standards governing hazardous chemicals.
Adopting this standard supports process consistency, quality control, and compatibility in international trade.
Related Standards
The following referenced ASTM standards and practices play key roles in supporting the requirements and analytical methods of ASTM D7951-20:
- ASTM D848 - Acid Wash Color of Industrial Aromatic Hydrocarbons
- ASTM D849 - Copper Strip Corrosion by Industrial Aromatic Hydrocarbons
- ASTM D3437 - Sampling and Handling Liquid Cyclic Products
- ASTM D4052 - Density and API Gravity of Liquids by Digital Density Meter
- ASTM D5386 / D8005 - Color Measurement of Clear Liquids
- ASTM D7183 / D7184 - Sulfur and Nitrogen Determination in Aromatic Hydrocarbons
- ASTM D7504 - Trace Impurities in Monocyclic Aromatic Hydrocarbons
- ASTM E29 - Using Significant Digits in Test Data
Additional regulatory documents, such as OSHA regulations (29 CFR 1910.1000 and 1910.1200), are referenced for safety and health requirements.
Conclusion
Implementing ASTM D7951-20 provides a reliable framework for the production, testing, and certification of disproportionation (TDP) toluene. Adherence to this standard ensures product quality, enhances industrial safety, and facilitates compliance with both national and international regulations. For the latest, official requirements, always refer to the current version published by ASTM International.
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Frequently Asked Questions
ASTM D7951-20 is a technical specification published by ASTM International. Its full title is "Standard Specification for Disproportionation (TDP) Toluene". This standard covers: 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. 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.
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. 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.
ASTM D7951-20 is classified under the following ICS (International Classification for Standards) categories: 71.040.50 - Physicochemical methods of analysis; 71.080.15 - Aromatic hydrocarbons. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D7951-20 has the following relationships with other standards: It is inter standard links to ASTM E2680-23, ASTM D7184-20, ASTM D7184-15(2019)e1, ASTM D849-15(2019)e1, ASTM D7183-18a, ASTM D7504-17a, ASTM D7504-17, ASTM D849-15, ASTM D7504-15, ASTM D7504-15e1, ASTM D7183-15, ASTM D8005-15, ASTM E2680-09(2015)e1, ASTM D848-14, ASTM D7184-13. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D7951-20 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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.
Designation: D7951 −20
Standard Specification for
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
D3437 Practice for Sampling and Handling Liquid Cyclic
1.1 This specification covers Disproportionation (TDP)
Products
toluene.
D4052 Test Method for Density, Relative Density, and API
1.2 The following applies to all specified limits in this
Gravity of Liquids by Digital Density Meter
specification: for purposes of determining conformance with
D5386 Test Method for Color of Liquids Using Tristimulus
this specification, an observed value or a calculated value shall
Colorimetry
be rounded off “to the nearest unit” in the last right-hand digit
D7183 Test Method for Determination of Total Sulfur in
used in expressing the specification limit, in accordance with
Aromatic Hydrocarbons and Related Chemicals by Ultra-
the rounding-off method of Practice E29.
violet Fluorescence
1.3 The values stated in SI units are to be regarded as D7184 Test Method for Ultra Low Nitrogen in Aromatic
Hydrocarbons by Oxidative Combustion and Reduced
standard. No other units of measurement are included in this
standard. Pressure Chemiluminescence Detection
D7360 Test Method for Analysis of Benzene by Gas Chro-
1.4 Consult current OSHA regulations, supplier’s Safety
matography with External Calibration
Data Sheets, and local regulations for all materials used in this
D7504 Test Method for Trace Impurities in Monocyclic
specification.
Aromatic Hydrocarbons by Gas Chromatography and
1.5 This standard does not purport to address all of the
Effective Carbon Number
safety concerns, if any, associated with its use. It is the
D8005 Test Method for Color of Clear Liquids (Platinum-
responsibility of the user of this standard to establish appro-
Cobalt Scale)
priate safety, health, and environmental practices and deter-
E29 Practice for Using Significant Digits in Test Data to
mine the applicability of regulatory limitations prior to use.
Determine Conformance with Specifications
1.6 This international standard was developed in accor-
E2680 Test Method for Appearance of Clear, Transparent
dance with internationally recognized principles on standard-
Liquids (Visual Inspection Procedure)
ization established in the Decision on Principles for the
2.2 Other Documents:
Development of International Standards, Guides and Recom-
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
mendations issued by the World Trade Organization Technical
1910.1200
Barriers to Trade (TBT) Committee.
3. Properties
2. Referenced Documents
3.1 Disproportionation toluene shall conform to the follow-
2.1 ASTM Standards:
ing requirements:
D848 Test Method for Acid Wash Color of Industrial Aro-
ASTM
matic Hydrocarbons Property Specification
A
Test Metho
...
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 − 19 D7951 − 20
Standard Specification for
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, 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.
2. Referenced Documents
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
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
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
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
D8005 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
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)
2.2 Other Documents:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and 1910.1200
This specification is under the jurisdiction of ASTM Committee D16 on Aromatic
...
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