ASTM E298-17
(Test Method)Standard Test Methods for Assay of Organic Peroxides
Standard Test Methods for Assay of Organic Peroxides
SIGNIFICANCE AND USE
3.1 Organic peroxides are widely used as chemical intermediates, catalysts, and initiators. These test methods provide procedures for assaying organic peroxides to determine if they are suitable for their intended use.
SCOPE
1.1 These test methods cover the assay of organic peroxides. Two procedures are given, depending upon the ease of reduction:
1.1.1 Sodium Iodide, Room Temperature Test Method, for organic peroxides easy to reduce, and
1.1.2 Sodium Iodide, 60°C Test Method, for organic peroxides that are moderately stable.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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.
1.4 Review the current Safety Data Sheets (SDS) for detailed information concerning toxicity, first-aid procedures, and safety precautions.
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Designation: E298 − 17
Standard Test Methods for
1
Assay of Organic Peroxides
This standard is issued under the fixed designation E298; 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* provide procedures for assaying organic peroxides to deter-
mine if they are suitable for their intended use.
1.1 Thesetestmethodscovertheassayoforganicperoxides.
Two procedures are given, depending upon the ease of reduc-
4. Purity of Reagents
tion:
4.1 Purity of Reagents—Reagent grade chemicals shall be
1.1.1 Sodium Iodide, Room Temperature Test Method, for
used in all tests. Unless otherwise indicated, it is intended that
organic peroxides easy to reduce, and
all reagents shall conform to the specifications of the Commit-
1.1.2 Sodium Iodide, 60°C Test Method, for organic perox-
tee onAnalytical Reagents of theAmerican Chemical Society,
ides that are moderately stable.
4
where such specifications are available. Other grades may be
1.2 The values stated in SI units are to be regarded as
used, provided it is first ascertained that the reagent is of
standard. The values given in parentheses are for information
sufficiently high purity to permit its use without lessening the
only.
accuracy of the determination.
1.3 This standard does not purport to address all of the
4.2 Unless otherwise indicated, references to water shall be
safety concerns, if any, associated with its use. It is the
understood to meanType II orType III reagent water conform-
responsibility of the user of this standard to establish appro-
ing to Specification D1193.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
SODIUM IODIDE, ROOM TEMPERATURE TEST
1.4 Review the current Safety Data Sheets (SDS) for de- METHOD
tailedinformationconcerningtoxicity,first-aidprocedures,and
5. Scope
safety precautions.
5.1 This test method covers the assay of organic peroxides
2. Referenced Documents
that are easily reduced, such as hydroperoxides and diacyl
2
peroxides. Dialkyl peroxides do not react, while peresters and
2.1 ASTM Standards:
bridge-type peroxides like ascaridole react slowly and incom-
D1193 Specification for Reagent Water
pletely.
E180 Practice for Determining the Precision of ASTM
Methods for Analysis and Testing of Industrial and Spe-
5.2 Specific peroxides that can be analyzed by this proce-
3
cialty Chemicals (Withdrawn 2009)
dure include the following:
E200 Practice for Preparation, Standardization, and Storage
5.2.1 Diacyl Peroxides—Benzoyl 2,4-dichlorobenzoyl,
of Standard and Reagent Solutions for ChemicalAnalysis
p-chlorobenzoyl, lauroyl, acetyl, and decanoyl peroxides.
5.2.2 Dibasic Acid Peroxide—Succinic acid peroxide.
3. Significance and Use
5.2.3 Ketone Peroxides—Cyclohexanone peroxide and
3.1 Organic peroxides are widely used as chemical
methyl ethyl ketone peroxide.
intermediates, catalysts, and initiators. These test methods
5.2.4 Alkyl Hydroperoxides—tert-Butylhydroperoxide and
2,5-dimethylhexane-2,5-dihydroperoxide.
1
These test methods are under the jurisdiction of ASTM Committee D16 on
6. Summary of Test Method
Aromatic Hydrocarbons and Related Chemicals and are the direct responsibility of
Subcommittee D16.15 on Industrial and Specialty General Standards. 6.1 A sample is dissolved in a mixture of methylene
Current edition approved Feb. 1, 2017. Published February 2017. Originally
chloride and acetic acid.Asaturated solution of sodium iodide
approved in 1966. Last previous edition approved in 2008 as E298 – 08. DOI:
10.1520/E0298-17.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Reagent Chemicals, American Chemical Society Specifications, American
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Standards volume information, refer to the standard’s Document Summary page on listed by the American Chemical Society, see Analar Standards for Laboratory
the ASTM website. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
3
The last approved version of this historical standard is referenced on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
www.astm.org. MD.
*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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E298 − 17
is added and the mixture is allowed to react in the dark at room 10.6 Subtract the nu
...
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: E298 − 08 E298 − 17
Standard Test Methods for
1
Assay of Organic Peroxides
This standard is issued under the fixed designation E298; 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 These test methods cover the assay of organic peroxides. Two procedures are given, depending upon the ease of reduction:
1.1.1 Sodium Iodide, Room Temperature Test Method, for organic peroxides easy to reduce, and
1.1.2 Sodium Iodide, 60°C Test Method, for organic peroxides that are moderately stable.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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.
1.4 Review the current material safety data sheets (MSDS) Safety Data Sheets (SDS) for detailed information concerning
toxicity, first-aid procedures, and safety precautions.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
3. Significance and Use
3.1 Organic peroxides are widely used as chemical intermediates, catalysts, and initiators. These test methods provide
procedures for assaying organic peroxides to determine if they are suitable for their intended use.
4. Purity of Reagents
4.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
4
such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
4.2 Unless otherwise indicated, references to water shall be understood to mean Type II or Type III reagent water conforming
to Specification D1193.
SODIUM IODIDE, ROOM TEMPERATURE TEST METHOD
5. Scope
5.1 This test method covers the assay of organic peroxides that are easily reduced, such as hydroperoxides and diacyl peroxides.
Dialkyl peroxides do not react, while peresters and bridge-type peroxides like ascaridole react slowly and incompletely.
1
These test methods are under the jurisdiction of ASTM Committee D16 on Aromatic Hydrocarbons and Related Chemicals and are the direct responsibility of
Subcommittee D16.15 on Industrial and Specialty General Standards.
Current edition approved April 1, 2008Feb. 1, 2017. Published May 2008February 2017. Originally approved in 1966. Last previous edition approved in 20012008 as
E298 – 01.E298 – 08. DOI: 10.1520/E0298-08.10.1520/E0298-17.
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
The last approved version of this historical standard is referenced on www.astm.org.
4
Reagent Chemicals, American Chemical Society Specifications, American Chemical Society, Washington, DC. For suggestions on the testing of reagents not listed by
the American Chemical Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia and National
Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville, MD.
*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 ----------------------
E298 − 17
5.2 Specific peroxides that can be analyzed by this procedure include the following:
5.2.1 Diacyl Peroxides—Benzoyl 2,4-dichlorobenzoyl,
p-chlorobenzoyl, lauroyl, acetyl, and decanoyl peroxides.
5.2.2 Dibasic Acid Peroxide—Succinic acid peroxide.
5.2.3 Ketone Peroxides—Cycl
...
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