ASTM D2080-92(1998)

Standard Test Method for Average Molecular Weight of Fatty Quaternary Ammonium Chlorides (Withdrawn 2007)

SCOPE
1.1 This test method covers the determination of the average molecular weight of a fatty quaternary ammonium chloride by converting to the acetate, titrating potentiometrically, and correcting for the nonquaternary components.
1.2 This standard does not purport to address all of the safety problems, 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.>
WITHDRAWN RATIONALE
This test method covers the determination of the average molecular weight of a fatty quaternary ammonium chloride by converting to the acetate, titrating potentiometrically, and correcting for the nonquaternary components.
Formerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials, and Applications, this test method was withdrawn in March 2007 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1991
• Withdrawal Date: 19-Mar-2007
• ICS: 71.060.50 - Salts
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2080–92(Reapproved1998)
Standard Test Method for
Average Molecular Weight of Fatty Quaternary Ammonium
Chlorides
This standard is issued under the fixed designation D 2080; 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.
This method was prepared jointly by the American Society for Testing and Materials and the American Oil Chemists’ Society.
1. Scope 4. Reagents
1.1 Thistestmethodcoversthedeterminationoftheaverage 4.1 Purity of Reagents—Reagent grade chemicals shall be
molecular weight of a fatty quaternary ammonium chloride by used in all tests. Unless otherwise indicated, it is intended that
converting to the acetate, titrating potentiometrically, and all reagents shall conform to the specifications of the Commit-
correcting for the nonquaternary components. tee onAnalytical Reagents of theAmerican Chemical Society,
1.2 This standard does not purport to address all of the where such specifications are available. Other grades may be
safety concerns, if any, associated with its use. It is the used, provided it is first ascertained that the reagent is of
responsibility of the user of this standard to establish appro- sufficiently high purity to permit its use without lessening the
priate safety and health practices and determine the applica- accuracy of the determination.
bility of regulatory limitations prior to use. 4.2 Purity of Water—Unless otherwise indicated, references
to water shall be understood to mean reagent water conforming
2. Referenced Documents
to Specification D 1193, Type II.
2.1 ASTM Standards:
4.3 Acetic Acid (Glacial) (CH COOH).
D 1193 Specification for Reagent Water 4.4 Acetic Anhydride (CH CO) O.
3 2
D 2076 Test Methods for Acid Value and Amine Value of
4.5 Chloroform (CHCl ).
Fatty Quaternary Ammonium Chlorides 4.6 Mercuric Acetate Solution—Dissolve6gof mercuric
D 2077 Test Method for Ash in Fatty Quaternary Ammo-
acetate [Hg(C H O ) ] in 100 mL of glacial acetic acid.
2 3 2 2
nium Chlorides Prepare fresh for each determination.
D 2079 Test Method for Nonvolatile Matter (Solids) in Caution—Mercury compounds are harmful and accumulate
Fatty Quaternary Ammonium Chlorides
in the aquatic environment. Mixtures containing mercury
E 70 Test Method for pH of Aqueous Solutions With the compounds should not be flushed down a drain but disposed of
Glass Electrod
as a hazardous waste.
4.7 Perchloric Acid, Standard Solution (0.1 N):
3. Apparatus
4.7.1 Add 28.4 g of 70 to 72 % perchloric acid (HClO)to
3.1 Buret, having a capacity of 25 mL.
1000 mL of glacial acetic acid in a 2-L beaker while stirring.
3.2 Glass Electrode pH Meter, conforming to the require-
Carefully add 46.6 g of acetic anhydride while stirring.
ments of Test Method E 70 or similar potentiometric titrator,
Carefully pour the solution through a glass funnel into a 2-L
and carefully standardized in accordance with the manufactur-
volumetric flask and dilute to mark with glacial acetic acid.
er’s instructions.
Mix the solution and allow to stand for 24 h before standard-
3.3 Magnetic Stirrer, with inert plastic-coated stirring bar.
izing.
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.32 on Drying Oils. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved March 15, 1992. Published May 1992. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
published as D 2080–62 T. Last previous edition D 2080 – 64 (1987). listed by the American Chemical Society, see Analar Standards for Laboratory
Annual Book of ASTM Standards, Vol 11.01. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 06.03. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 15.05. MD.
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D2080–92 (1998)
4.7.2
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