ASTM D2086-02

Standard Test Method for Acidity in Vinyl Acetate and Acetaldehyde

SCOPE
1.1 This test method covers the determination of total acidity as acetic acid in refined vinyl acetate and acetaldehyde.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 For purposes of determining conformance of an observed value or a calculated value using this test method to relevant specifications, test result(s) 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 E 29.
1.4 For hazard information and guidance, see the supplier's Material Safety Data Sheet.
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.

General Information

• Status: Historical
• Publication Date: 09-Jul-2002
• ICS: 71.080.80 - Aldehydes and ketones
• ICS: 71.080.99 - Other organic chemicals
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.35 - Solvents, Plasticizers, and Chemical Intermediates

Relations

• Replaces: ASTM D2086-99 - Standard Test Method for Acidity in Vinyl Acetate and Acetaldehyde
• Effective Date: 10-Jul-2002
• Replaced By: ASTM D2086-03 - Standard Test Method for Acidity in Vinyl Acetate and Acetaldehyde
• Effective Date: 01-Oct-2003
• Referred By: ASTM D2190-07(2021) - Standard Specification for Vinyl Acetate
• Effective Date: 10-Jul-2002

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2086 – 02
Standard Test Method for
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Acidity in Vinyl Acetate and Acetaldehyde
This standard is issued under the fixed designation D 2086; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope * 4. Significance and Use
1.1 This test method covers the determination of total 4.1 This test method provides a measurement of total acidity
acidity as acetic acid in refined vinyl acetate and acetaldehyde. in vinyl acetate and acetaldehyde. The results of these mea-
1.2 The values stated in SI units are to be regarded as the surements can be used for specification acceptance.
standard. The values given in parentheses are for information
5. Interferences
only.
5.1 Any material or contaminant that will react with NaOH
1.3 For purposes of determining conformance of an ob-
served value or a calculated value using this test method to under the test conditions will affect the results.
relevant specifications, test result(s) shall be rounded off “to 5.2 Vinyl acetate will decompose on storage, typically by
way of hydrolysis, to form acetic acid.
the nearest unit” in the last right-hand digit used in expressing
the specification limit, in accordance with the rounding-off 5.3 Acetaldehyde will react with oxygen, either dissolved or
in a storage container, to form acetic acid.
method of Practice E 29.
1.4 For hazard information and guidance, see the supplier’s 5.4 Various acids or other acidic materials may be present.
Common practice, including the method used here, calculates
Material Safety Data Sheet.
1.5 This standard does not purport to address all of the these as acetic acid. The actual weight percent of acidic
materials may be different.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety and health practices and determine the applica-
6.1 Buret, 10-mL, graduated in 0.05-mL subdivisions.
bility of regulatory limitations prior to use. For specific hazard
6.2 Erlenmeyer Flask, 250-mL capacity.
statements, see Section 8.
6.3 Graduated Cylinder, 50 or 100-mL capacity.
2. Referenced Documents
6.4 Cold Bath, maintained at 0°C or below.
2.1 ASTM Standards:
2 7. Reagents
D 1193 Specification for Reagent Water
7.1 Purity of Reagents—Reagent grade chemicals shall be
E 29 Practice for Using Significant Digits in Test Data to
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used in all tests. Unless otherwise indicated, it is intended that
Determine Conformance with Specifications
all reagents shall conform to the specifications of the Commit-
E 200 Practice for Preparation, Standardization, and Stor-
tee on Analytical Reagents of the American Chemical Society,
age of Standard and Reagent Solutions for Chemical
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where such specifications are available. Other grades may be
Analysis
used, provided it is first ascertained that the reagent is of
3. Summary of Test Method
sufficiently high purity to permit its use without lessening the
3.1 The specimen is mixed with either an equal volume of accuracy of the determination.
7.2 Purity of Water—Unless otherwise indicated, references
chilled water or an equal volume of ethyl alcohol and titrated
at reduced temperature with aqueous sodium hydroxide solu- to water shall be understood to mean reagent water as defined
by Type IV of Specification D 1193.
tion to a phenolphthalein end point.
7.3 Ethyl Alcohol (Ethanol), 95 volume %, minimum.
NOTE 1—Denatured ethyl alcohol conforming to Formula No. 3A of the
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D 01.35 on Solvents, Plasticizers, and Chemical Intermediates.
5
Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved July 10, 2002. Published September 2002. Originally
Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 2086 – 62 T. Last previous edition D 2086 – 99.
2 listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 11.01.
3 Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 14.02.
4 and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 15.05.
MD.
*A Summary of Changes section appears at the end of this standard.
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