ASTM D4493-08
(Test Method)Standard Test Method for Solidification Point of Bisphenol A
(4,4′-Isopropylidenediphenol)
Standard Test Method for Solidification Point of Bisphenol A <br> (4,4<span class='unicode'>′</span>-Isopropylidenediphenol)
SIGNIFICANCE AND USE
The solidification point of bisphenol A is a direct indication of its purity, although it gives no information as to the nature of any impurities present.
High purity bisphenol A has a solidification point of approximately 157°C.
This test method can be used for internal quality control or for setting specifications.
SCOPE
1.1 This test method describes the procedure for determination of the solidification point of bisphenol A (4,4′-isopropylidene diphenol).
1.2 The method is applicable for determination of the solidification point between 150 and 157°C.
1.3 In determining 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 E 29.
1.4 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 9.
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Designation: D4493 −08
Standard Test Method for
Solidification Point of Bisphenol A
1
(4,4*-Isopropylidenediphenol)
This standard is issued under the fixed designation D4493; 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* E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method describes the procedure for determina-
2.2 Other Documents:
tion of the solidification point of bisphenol A (4,48-
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
isopropylidene diphenol).
4
1910.1200
1.2 The method is applicable for determination of the
solidification point between 150 and 157°C.
3. Terminology
1.3 In determining conformance of the test results using this 3.1 Definitions:
methodtoapplicablespecifications,resultsshallberoundedoff
3.1.1 solidification point—the temperature at which the
in accordance with the rounding-off method of Practice E29. liquid phase of a substance is in approximate equilibrium with
a relatively small amount of the same substance in its solid
1.4 This standard does not purport to address all of the
phase.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 Bisphenol A is melted, and then cooled slowly with
bility of regulatory limitations prior to use. For specific hazard
constant agitation. When crystallization begins, and super-
statements, see Section 9.
cooling occurs, the temperature falls to a minimum, rises to a
maximum, and then falls again. The maximum temperature
2. Referenced Documents
2 attained after crystallization begins is the solidification point of
2.1 ASTM Standards:
bisphenol A.
D1493 Test Method for Solidification Point of Industrial
3
Organic Chemicals (Withdrawn 2004)
5. Significance and Use
D4297 Practice for Sampling and Handling Bisphenol A
5.1 The solidification point of bisphenol A is a direct
(4,4' -Isopropylidinediphenol)
indication of its purity, although it gives no information as to
D6809 Guide for Quality Control and Quality Assurance
the nature of any impurities present.
Procedures for Aromatic Hydrocarbons and Related Ma-
terials 5.2 High purity bisphenol A has a solidification point of
E1 Specification for ASTM Liquid-in-Glass Thermometers approximately 157°C.
E29 Practice for Using Significant Digits in Test Data to
5.3 This test method can be used for internal quality control
Determine Conformance with Specifications
or for setting specifications.
E77 Test Method for Inspection and Verification of Ther-
mometers
6. Interference
6.1 BisphenolAthat is not stored or packaged properly may
adsorb moisture. Adsorbed moisture will lower the solidifica-
1
This test method is under the jurisdiction of ASTM Committee D16 on
tion point.
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
Subcommittee D16.02 on Oxygenated Aromatics.
Current edition approved June 1, 2012. Published January 2008. Originally 7. Apparatus
approved in 1985. Last previous edition approved in 2003 as D4493 – 03. DOI:
7.1 Nessler Tubes, borosilicate, 100 mL, short form, 32-mm
10.1520/D4493-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or diameter.
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
4
the ASTM website. AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
3
The last approved version of this historical standard is referenced on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.astm.org. 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 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
D4493 − 08
7.2 Electric Heat Block, thermostatically controlled, ca- 9.2 When handling molten solids in open tubes, adequate
pable of reaching 170°C; having flat-bottom holes 34 mm in ventilation must be provided and proper protection should be
diameter by 172 mm deep. A suitable block is 100 by 110 by used to prevent thermal burns. It is preferable to perform this
175 mm high, and made of aluminum. Alternatively, a ther- test in a fume hood.
mos
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D4493–03 Designation: D 4493 – 08
Standard Test Method for
Solidification Point of Bisphenol A
1
(4,4*-Isopropylidenediphenol)
This standard is issued under the fixed designation D 4493; 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
1.1This test method describes the procedure for determination of the solidification point of 4,48-isopropylidene diphenol,
commercially known as bisphenol A, between 150 and 157°C.
1.2The following applies to all specified limits in this standard: For purposes of determining conformance with this standard,
an observed value or a calculated value 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 E29*
1.1 This test method describes the procedure for determination of the solidification point of bisphenol A (4,48-isopropylidene
diphenol).
1.2 The method is applicable for determination of the solidification point between 150 and 157°C.
1.3 In determining 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 E 29.
1.3This 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 test method. For specific hazard statements, see Section
1.4 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 9.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1493 Test Method for Solidification Point of Industrial Organic Chemicals
2
D 4297 Practice for Sampling and Handling Bisphenol A (4,48–Isopropylidenediphenol) (4,4 -Isopropylidinediphenol)
D 6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials
E 1 Specification for ASTM Liquid-in-Glass Thermometers
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E 77 Test Method for Inspection and Verification of Thermometers
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
2.2 Other Document:
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and 1910.1200 Other Documents:
3
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and 1910.1200
3. Terminology
3.1 Definitions:
3.1.1 solidification point—the temperature at which the liquid phase of a substance is in approximate equilibrium with a
relatively small amount of the same substance in its solid phase.
1
This test method is under the jurisdiction ofASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility of Subcommittee
D16.02 on Oxygenated Aromatics.
Current edition approved Jan. 10, 2003.1, 2008. Published March 2003.January 2008. Originally approved in 1985. Last previous edition approved in 19942003 as
D4493–94.D 4493 – 03.
2
Annual Book of ASTM Standards, Vol 06.04.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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
Annual Book of ASTM Standards, Vol 14.03.
3
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
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 ----------------------
D4493–08
4. Summary of Test Method
4.1 Bisphenol A is melted, and then cooled slowly with constant agitation. When crystallization begins, and super-cooling
occurs, the temperature falls to a minimum, rises to a maximum, and then falls again. The maximum temperature attained after
crystallization begins is the solidification point of bisphenol A.
5. Significance and Use
5.1 The solidification point of bisph
...
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