ASTM D847-23

Standard Test Method for Acidity of Benzene, Toluene, Xylenes, Solvent Naphthas, and Similar Industrial Aromatic Hydrocarbons

SIGNIFICANCE AND USE
5.1 This test method is suitable for setting specifications, for use as an internal quality control tool, and for use in development or research work on industrial aromatic hydrocarbons and related materials. This test method gives an indication of residual acidity and is a measure of the quality of the finished product. It is an indication of the tendency of the product to corrode equipment.
SCOPE
1.1 This test method is intended for the detection of acidity of benzene, toluene, xylenes, solvent naphthas, and similar industrial aromatic hydrocarbons.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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. For specific hazard statements see Section 9.  
1.4 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: 31-Mar-2023
• ICS: 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

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: D847 − 23
Standard Test Method for
Acidity of Benzene, Toluene, Xylenes, Solvent Naphthas,
1
and Similar Industrial Aromatic Hydrocarbons
This standard is issued under the fixed designation D847; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 3. Terminology
1.1 This test method is intended for the detection of acidity 3.1 Definitions:
of benzene, toluene, xylenes, solvent naphthas, and similar 3.1.1 acidity, n—for purposes of this standard, acidity is
industrial aromatic hydrocarbons. defined as producing a persistent pink phenolphthalein end
point with the addition of two (2) drops or more (0.1 mL) of
1.2 The values stated in SI units are to be regarded as
0.1 N sodium hydroxide solution.
standard. No other units of measurement are included in this
3.1.2 acid reaction, n—a characteristic of materials produc-
standard.
ing the acid-color of the indicator used under the conditions
1.3 This standard does not purport to address all of the
prescribed in this test method.
safety concerns, if any, associated with its use. It is the
3.1.3 alkaline or basic reaction, n—a characteristic of the
responsibility of the user of this standard to establish appro-
materials producing the alkali-color of the indicator used under
priate safety, health, and environmental practices and deter-
the conditions prescribed in this test method.
mine the applicability of regulatory limitations prior to use.
For specific hazard statements see Section 9.
4. Summary of Test Method
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- 4.1 The acidity of aromatic hydrocarbons is detected using
ization established in the Decision on Principles for the a sodium hydroxide titration and a color change using a
Development of International Standards, Guides and Recom- phenolphthalein indicator.
mendations issued by the World Trade Organization Technical
5. Significance and Use
Barriers to Trade (TBT) Committee.
5.1 This test method is suitable for setting specifications, for
2. Referenced Documents
use as an internal quality control tool, and for use in develop-
2
2.1 ASTM Standards: ment or research work on industrial aromatic hydrocarbons and
D1193 Specification for Reagent Water related materials. This test method gives an indication of
D3437 Practice for Sampling and Handling Liquid Cyclic residual acidity and is a measure of the quality of the finished
Products product. It is an indication of the tendency of the product to
2.2 Other Documents: corrode equipment.
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
3
6. Interferences
1910.1200
6.1 Tests for acidity are not applicable in the presence of
contaminating acidic or alkaline gases, soaps, salts, or other
1
This test method is under the jurisdiction of ASTM Committee D16 on
compounds derived from the atmosphere or apparatus. The
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
bility of Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and
container holding the specimen, and the apparatus, water,
Their Derivatives.
indicator, and other materials used in the test shall be chosen so
Current edition approved April 1, 2023. Published April 2023. Originally
that they themselves shall not appreciably affect the results.
approved in 1945. Last previous edition approved in 2016 as D847 – 16. DOI:
10.1520/D0847-23. Since new corks used in specimen bottles often are bleached
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
with oxalic acid, it is advisable to rinse them thoroughly and
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
check them for neutrality with the indicator used in the test.
Standards volume information, refer to the standard’s Document Summary page on
4
Glassware shall be of acid-resistant and alkali-resistant glass
the ASTM website.
3
Available from U.S. Government Printing Office Superintendent of Documents,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
4
www.access.gpo.gov. Borosilicate glass or the equivalent has been found satisfactory for this purpose.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United
...

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: D847 − 16 D847 − 23
Standard Test Method for
Acidity of Benzene, Toluene, Xylenes, Solvent Naphthas,
1
and Similar Industrial Aromatic Hydrocarbons
This standard is issued under the fixed designation D847; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This test method is intended for the detection of acidity of benzene, toluene, xylenes, solvent naphthas, and similar industrial
aromatic hydrocarbons.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 and healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.For specific hazard statements see Section 9.
1.4 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:
D1193 Specification for Reagent Water
D3437 Practice for Sampling and Handling Liquid Cyclic Products
2.2 Other Documents:
3
OSHA Regulations, 29CFR29 CFR paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 Definitions:
3.1.1 acidity, n—for purposes of this standard, acidity is defined as producing a persistent pink phenolphthalein end point with the
addition of two (2) drops or more (0.1 mL) of 0.1 N 0.1 N sodium hydroxide solution.
3.1.2 acid reaction, n—a characteristic of materials producing the acid-color of the indicator used under the conditions prescribed
in this test method.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons 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, 2016April 1, 2023. Published July 2016April 2023. Originally approved in 1945. Last previous edition approved in 20152016 as
D847 – 15.D847 – 16. DOI: 10.1520/D0847-16.10.1520/D0847-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available 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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D847 − 23
3.1.3 alkaline or basic reaction, n—a characteristic of the materials producing the alkali-color of the indicator used under the
conditions prescribed in this test method.
4. Summary of Test Method
4.1 The acidity of aromatic hydrocarbons is detected using a sodium hydroxide titration and a color change using a
phenolphthalein indicator.
5. Significance and Use
5.1 This test method is suitable for setting specifications, for use as an internal quality control tool, and for use in development
or research work on industrial aromatic hydrocarbons and related materials. This test method gives an indication of residual acidity
and is a measure of the quality of the finished product. It is an indication of the tendency of the product to corrode equipment.
6. Interferences
6.1 Tests for acidity are not applicable in the presence of contaminating acidic or alkaline gases, soaps, salts, or other compounds
derived from the atmosphere or apparatus. The container holding the specimen, and the apparatus, water, indicator, and other
materials used in the test shall be chosen so that they themselves shall not appreciably affect the results. Since new corks used in
specimen bottles o
...