ASTM E487-20
(Test Method)Standard Test Methods for Constant-Temperature Stability of Chemical Materials
Standard Test Methods for Constant-Temperature Stability of Chemical Materials
SIGNIFICANCE AND USE
5.1 These test methods are useful adjunct to dynamic thermal tests that are performed under conditions in which the sample temperature is increased continuously at a programmed rate. Results obtained under dynamic test conditions present difficulties in determining the temperature at which an exotherm initiates because onset temperature is dependent on heating rate. These test methods describe in the present standard attempts to determine the onset temperature under isothermal conditions where the heating rate is zero.
SCOPE
1.1 These test methods describe the assessment of constant-temperature stability (CTS) of chemical materials that undergo exothermic reactions. The techniques and apparatus described may be used on solids, liquids, or slurries of chemical substances.
1.2 When a series of materials is tested by these test methods, the results permit ordering the materials relative to each other with respect to their thermal stability.
1.3 Limitations of Test:
1.3.1 These test methods are limited to ambient temperatures and above.
1.3.2 These test methods determine neither a safe storage temperature nor a safe processing temperature.
Note 1: A safe storage or processing temperature requires that any heat produced by a reaction be removed as fast as generated and that proper consideration be given to hazards associated with reaction products.
1.3.3 When these test methods are used to order the relative thermal stability of materials, the tests must be run under the same confinement condition (see 8.3).
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.
1.6 This standard may involve hazardous materials, operations, and equipment. 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.
1.7 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
Relations
Buy Standard
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: E487 − 20
Standard Test Methods for
1
Constant-Temperature Stability of Chemical Materials
This standard is issued under the fixed designation E487; 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 use. It is the responsibility of the user of this standard to
establish appropriate safety, health, and environmental prac-
1.1 These test methods describe the assessment of constant-
tices and determine the applicability of regulatory limitations
temperature stability (CTS) of chemical materials that undergo
prior to use.
exothermic reactions. The techniques and apparatus described
1.7 This international standard was developed in accor-
may be used on solids, liquids, or slurries of chemical
dance with internationally recognized principles on standard-
substances.
ization established in the Decision on Principles for the
1.2 When a series of materials is tested by these test
Development of International Standards, Guides and Recom-
methods, the results permit ordering the materials relative to
mendations issued by the World Trade Organization Technical
each other with respect to their thermal stability.
Barriers to Trade (TBT) Committee.
1.3 Limitations of Test:
2. Referenced Documents
1.3.1 These test methods are limited to ambient tempera-
2
tures and above.
2.1 ASTM Standards:
1.3.2 These test methods determine neither a safe storage E473 Terminology Relating to Thermal Analysis and Rhe-
temperature nor a safe processing temperature.
ology
E537 Test Method for The Thermal Stability of Chemicals
NOTE 1—A safe storage or processing temperature requires that any
by Differential Scanning Calorimetry
heat produced by a reaction be removed as fast as generated and that
E967 Test Method for Temperature Calibration of Differen-
proper consideration be given to hazards associated with reaction prod-
ucts.
tial Scanning Calorimeters and Differential Thermal Ana-
lyzers
1.3.3 When these test methods are used to order the relative
E968 Practice for Heat Flow Calibration of Differential
thermal stability of materials, the tests must be run under the
Scanning Calorimeters
same confinement condition (see 8.3).
E1445 Terminology Relating to Hazard Potential of Chemi-
1.4 The values stated in SI units are to be regarded as
cals
standard. No other units of measurement are included in this
E1860 Test Method for Elapsed Time Calibration of Ther-
standard.
mal Analyzers
1.5 This standard should be used to measure and describe
the properties of materials, products, or assemblies in response 3. Terminology
to heat and flame under controlled laboratory conditions and
3.1 Definitions:
should not be used to describe or appraise the fire hazard or
3.1.1 The specialized terms in this standard are described in
fire risk of materials, products, or assemblies under actual fire
Terminologies E473 and E1445, including differential scan-
conditions. However, results of this test may be used as
ning calorimetry, differential thermal analysis, exotherm, and
elements of a fire risk assessment which takes into account all
first-deviation-from-baseline.
of the factors which are pertinent to an assessment of the fire
3.2 Definitions of Terms Specific to This Standard:
hazard of a particular end use.
3.2.1 constant-temperature stability (CTS) value, n—the
1.6 This standard may involve hazardous materials,
maximum temperature at which a chemical compound or
operations, and equipment. This standard does not purport to
mixture may be held for a 120-min period under the conditions
address all of the safety concerns, if any, associated with its
imposed in this test without exhibiting a measurable exother-
mic reaction.
1
These test methods are under the jurisdiction of ASTM Committee E27 on
Hazard Potential of Chemicals and is the direct responsibility of E27.02 on Thermal
2
Stability and Condensed Phases. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2020. Published February 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2014 as E487 – 14. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E0487-20. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ---------------------
...
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: E487 − 14 E487 − 20
Standard Test MethodMethods for
1
Constant-Temperature Stability of Chemical Materials
This standard is issued under the fixed designation E487; 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 ThisThese test method describesmethods describe the assessment of constant-temperature stability (CTS) of chemical
materials that undergo exothermic reactions. The techniques and apparatus described may be used on solids, liquids, or slurries of
chemical substances.
1.2 When a series of materials is tested by thisthese test method,methods, the results permit ordering the materials relative to
each other with respect to their thermal stability.
1.3 Limitations of Test:
1.3.1 ThisThese test method ismethods are limited to ambient temperatures and above.
1.3.2 ThisThese test method determinesmethods determine neither a safe storage temperature nor a safe processing temperature.
NOTE 1—A safe storage or processing temperature requires that any heat produced by a reaction be removed as fast as generated and that proper
consideration be given to hazards associated with reaction products.
1.3.3 When thisthese test method ismethods are used to order the relative thermal stability of materials, the tests must be run
under the same confinement condition (see 8.3).
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to
heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk
of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire
risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular
end use.
1.6 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all
of the safety problems concerns, if any, associated with its use. It is the responsibility of whoever uses the user of this standard
to consult and establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 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:
E473 Terminology Relating to Thermal Analysis and Rheology
E537 Test Method for The Thermal Stability of Chemicals by Differential Scanning Calorimetry
E967 Test Method for Temperature Calibration of Differential Scanning Calorimeters and Differential Thermal Analyzers
E968 Practice for Heat Flow Calibration of Differential Scanning Calorimeters
E1445 Terminology Relating to Hazard Potential of Chemicals
E1860 Test Method for Elapsed Time Calibration of Thermal Analyzers
1
ThisThese test method ismethods are under the jurisdiction of ASTM Committee E27 on Hazard Potential of Chemicals and is the direct responsibility of E27.02 on
Thermal Stability and Condensed Phases.
Current edition approved March 1, 2014Feb. 1, 2020. Published March 2014February 2020. Originally approved in 1974. Last previous edition approved in 20092014
as E487 – 09.E487 – 14. DOI: 10.1520/E0487-14.10.1520/E0487-20.
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’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E487 − 20
3. Terminology
3.1 Definitions:
3.1.1 constant-temperature stability (CTS) value—the maximum temperature at which a chemical compound or mixture may be
held for a 120-min period under the conditions imposed in th
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.