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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 9.

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ASTM D847-16 - Standard Test Method for Acidity of Benzene, Toluene, Xylenes, Solvent Naphthas, and Similar Industrial Aromatic Hydrocarbons
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REDLINE ASTM D847-16 - Standard Test Method for Acidity of Benzene, Toluene, Xylenes, Solvent Naphthas, and Similar Industrial Aromatic Hydrocarbons
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D847 − 16
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* point with the addition of two (2) drops or more (0.1 mL) of 0.1
N sodium hydroxide solution.
1.1 This test method is intended for the detection of acidity
3.1.2 acid reaction, n—a characteristic of materials produc-
of benzene, toluene, xylenes, solvent naphthas, and similar
ing the acid-color of the indicator used under the conditions
industrial aromatic hydrocarbons.
prescribed in this test method.
1.2 The values stated in SI units are to be regarded as
3.1.3 alkaline or basic reaction, n—a characteristic of the
standard. No other units of measurement are included in this
materials producing the alkali-color of the indicator used under
standard.
the conditions prescribed in this test method.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 The acidity of aromatic hydrocarbons is detected using
priate safety and health practices and determine the applica-
a sodium hydroxide titration and a color change using a
bility of regulatory limitations prior to use. For specific hazard
phenolphthalein indicator.
statements see Section 9.
5. Significance and Use
2. Referenced Documents
5.1 This test method is suitable for setting specifications, for
2
2.1 ASTM Standards:
use as an internal quality control tool, and for use in develop-
D1193 Specification for Reagent Water
ment or research work on industrial aromatic hydrocarbons and
D3437 Practice for Sampling and Handling Liquid Cyclic
related materials. This test method gives an indication of
Products
residual acidity and is a measure of the quality of the finished
2.2 Other Documents:
product. It is an indication of the tendency of the product to
OSHA Regulations, 29CFR paragraphs 1910.1000 and
corrode equipment.
3
1910.1200
6. Interferences
3. Terminology
6.1 Tests for acidity are not applicable in the presence of
contaminating acidic or alkaline gases, soaps, salts, or other
3.1 Definitions:
compounds derived from the atmosphere or apparatus. The
3.1.1 acidity, n—for purposes of this standard, acidity is
container holding the specimen, and the apparatus, water,
defined as producing a persistent pink phenolphthalein end
indicator, and other materials used in the test shall be chosen so
that they themselves shall not appreciably affect the results.
1
This test method is under the jurisdiction of ASTM Committee D16 on Since new corks used in specimen bottles often are bleached
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
with oxalic acid, it is advisable to rinse them thoroughly and
Subcommittee D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their
check them for neutrality with the indicator used in the test.
Derivatives.
4
Glassware shall be of acid-resistant and alkali-resistant glass
Current edition approved June 1, 2016. Published July 2016. Originally approved
in 1945. Last previous edition approved in 2015 as D847 – 15. DOI: 10.1520/
and shall be rinsed with neutral distilled water before use. The
D0847-16.
room in which the test is performed shall be chosen so as to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
prevent undue contamination by carbon dioxide, ammonia, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
other interfering substances that may be present in the atmo-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
sphere.
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 States
1

---------------------- Page: 1 ----------------------
D847 − 16
6.2 The distilled water used in the test shall not alter the below 80°C during the titration. If more than 1 drop (0.05 mL)
composition of the specimen nor otherwise interfere
...

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 − 15 D847 − 16
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 health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements see Section 9.
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, 29CFR 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 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.
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.
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.01 on Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives.
Current edition approved Aug. 1, 2015June 1, 2016. Published September 2015July 2016. Originally approved in 1945. Last previous edition approved in 20042015 as
D847 – 08.D847 – 15. DOI: 10.1520/D0847-15.10.1520/D0847-16.
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
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

---------------------- Page: 1 ----------------------
D847 − 16
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 often are bleached with oxalic acid, it is advisable to rinse them thoroughly and check them for neutrality
4
with the indicator used in the test. Glassware shall be of acid-resistant and alkali-resistant glass and shall be rinsed with neutral
distilled water before use. The room in which the test is performed shall be chosen so as to prevent undue contamination by carbon
dioxide, ammonia, or o
...

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