ASTM E1228-23

Standard Test Method for Assay of Peroxy Esters—Catalyzed Iodometric Procedure

SIGNIFICANCE AND USE
5.1 Peroxy esters are widely used as chemical intermediates, catalysts, and initiators. This test method provides a procedure for assaying peroxy esters to determine if they are suitable for their intended use.
SCOPE
1.1 This test method covers the assay of organic peroxides of the peroxy ester type.  
Note 1: Other test methods for the assay of organic peroxides are given in Test Methods E298, E475, and E755.  
1.2 Review the current safety data sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.  
1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this test method.  
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 9.  
1.6 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: 71.080.70 - Esters
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.12 - Caustics and Peroxides

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: E1228 − 23
Standard Test Method for
1
Assay of Peroxy Esters—Catalyzed Iodometric Procedure
This standard is issued under the fixed designation E1228; 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* D6809 Guide for Quality Control and Quality Assurance
Procedures for Aromatic Hydrocarbons and Related Ma-
1.1 This test method covers the assay of organic peroxides
terials
of the peroxy ester type.
E29 Practice for Using Significant Digits in Test Data to
NOTE 1—Other test methods for the assay of organic peroxides are
Determine Conformance with Specifications
given in Test Methods E298, E475, and E755.
E180 Practice for Determining the Precision of ASTM
1.2 Review the current safety data sheets (SDS) for detailed
Methods for Analysis and Testing of Industrial and Spe-
3
information concerning toxicity, first aid procedures, and safety
cialty Chemicals (Withdrawn 2009)
precautions.
E200 Practice for Preparation, Standardization, and Storage
of Standard and Reagent Solutions for Chemical Analysis
1.3 The values stated in SI units are to be regarded as the
standard. No other units of measurement are included in this E298 Test Methods for Assay of Organic Peroxides
E300 Practice for Sampling Industrial Chemicals
test method.
E475 Test Method for Assay of Di-tert-Butyl Peroxide
1.4 In determining the conformance of the test results using
Using Gas Chromatography
this method to applicable specifications, results shall be
E691 Practice for Conducting an Interlaboratory Study to
rounded off in accordance with the rounding-off method of
Determine the Precision of a Test Method
Practice E29.
E755 Test Method for Dicumyl Peroxide, Assay (Liquid
1.5 This standard does not purport to address all of the
3
Chromatography) (Withdrawn 2016)
safety concerns, if any, associated with its use. It is the
2.2 Other Documents:
responsibility of the user of this standard to establish appro-
OSHA Regulations, 29 CFR paragraphs 19100.1000 and
priate safety, health, and environmental practices and deter-
4
1910.1200 Air contaminates – table of exposure limits
mine the applicability of regulatory limitations prior to use.
and Hazard Communication
Specific hazards statements are given in Section 9.
1.6 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions:
ization established in the Decision on Principles for the
3.1.1 active oxygen—the oxidizing power present in organic
Development of International Standards, Guides and Recom-
peroxides expressed as oxygen (equivalent weight 8.00).
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Test Method
2. Referenced Documents
4.1 A sample is dissolved in a mixture of isopropyl alcohol,
2
2.1 ASTM Standards:
acetic acid, and cupric chloride. A solution of potassium iodide
D1193 Specification for Reagent Water
is added and the mixture is briefly heated, then allowed to react
in the dark at room temperature for 30 min. The cupric ion
1
This test method is under the jurisdiction of ASTM Committee D16 on
catalyzes the reduction of the peroxide and the liberated iodine
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
is titrated with standard sodium thiosulfate solution.
bility of Subcommittee D16.12 on Caustics and Peroxides.
Current edition approved April 1, 2023. Published June 2023. Originally
approved in 1988. Last previous edition approved in 2017 as E1228 – 17. DOI:
3
10.1520/E1228-23. The last approved version of this historical standard is referenced on
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.astm.org.
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from U.S. Government Printing Office, Superintendent of
Standards volume information, refer to the standard’s Document Summary page on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
the ASTM website. 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 ----------------------
E1228 − 23
5. Significance and Use reducing agents and sources of heat, sparks, or open flames.
Reactivity varies widely and some compounds m
...

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: E1228 − 17 E1228 − 23
Standard Test Method for
1
Assay of Peroxy Esters—Catalyzed Iodometric Procedure
This standard is issued under the fixed designation E1228; 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 This test method covers the assay of organic peroxides of the peroxy ester type.
NOTE 1—Other test methods for the assay of organic peroxides are given in Test Methods E298, E475, and E755.
1.2 Review the current safety data sheets (SDS) for detailed information concerning toxicity, first aid procedures, and safety
precautions.
1.3 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this test method.
1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off
in accordance with the rounding-off method of Practice E29.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. Specific hazards statements are given in Section 9.
1.6 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
D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
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
E298 Test Methods for Assay of Organic Peroxides
E300 Practice for Sampling Industrial Chemicals
1
This test method is under the jurisdiction of ASTM Committee D16 on Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsibility of
Subcommittee D16.12 on Caustics and Peroxides.
Current edition approved June 1, 2017April 1, 2023. Published July 2017June 2023. Originally approved in 1988. Last previous edition approved in 20092017 as
E1228 – 09.E1228 – 17. DOI: 10.1520/E1228-17.10.1520/E1228-23.
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
The last approved version of this historical standard is referenced on www.astm.org.
*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 ----------------------
E1228 − 23
E475 Test Method for Assay of Di-tert-Butyl Peroxide Using Gas Chromatography
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
E755 Test Method for Dicumyl Peroxide, Assay (Liquid Chromatography) (Withdrawn 2016)
2.2 Other Documents:
4
OSHA Regulations, 29 CFR paragraphs 19100.1000 and 1910.1200 Air contaminates – table of exposure limits and Hazard
Communication
3. Terminology
3.1 Definitions:
3.1.1 active oxygen—the oxidizing power present in organic peroxides expressed as oxygen (equivalent weight 8.00).
4. Summary of Test Method
4.1 A sample is dissolved in a mixture of isopropyl alcohol, acetic acid, and cupric chloride. A solution of potassium iodide is
added and the mixture is briefly heated, then allowed to react in the dark at room temperature for 30 min. The cupric ion catalyzes
the reduction of the peroxide and the liberated iodine is titrated with standard sodium thiosulfate solution.
5. Significance and Use
5.1 Peroxy esters are widely used as chemical intermediates, catalysts, and initiators. This
...