ASTM D4493-12
(Test Method)Standard Test Method for Solidification Point of Bisphenol A (4,4`-Isopropylidenediphenol)
Standard Test Method for Solidification Point of Bisphenol A <brk/>(4,4`-Isopropylidenediphenol)
SIGNIFICANCE AND USE
5.1 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.
5.2 High purity bisphenol A has a solidification point of approximately 157°C.
5.3 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 test method has been found 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 E29.
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 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 −12
StandardTest 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* E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This test method describes the procedure for determina-
E77 Test Method for Inspection and Verification of Ther-
tion of the solidification point of bisphenol A (4,4'-
mometers
isopropylidene diphenol).
E691 Practice for Conducting an Interlaboratory Study to
1.2 The test method has been found applicable for determi-
Determine the Precision of a Test Method
nation of the solidification point between 150 and 157°C.
2.2 Other Documents:
1.3 In determining conformance of the test results using this OSHA Regulations, 29 CFR paragraphs 1910.1000 and
4
methodtoapplicablespecifications,resultsshallberoundedoff 1910.1200
in accordance with the rounding-off method of Practice E29.
3. Terminology
1.4 The values stated in SI units are to be regarded as
3.1 Definitions:
standard. No other units of measurement are included in this
3.1.1 solidification point, n—the temperature at which the
standard.
liquid phase of a substance is in approximate equilibrium with
1.5 This standard does not purport to address all of the
a relatively small amount of the same substance in its solid
safety concerns, if any, associated with its use. It is the
phase.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. For specific hazard
4.1 Bisphenol A is melted, and then cooled slowly with
statements, see Section 9.
constant agitation. When crystallization begins, and super-
cooling occurs, the temperature falls to a minimum, rises to a
2. Referenced Documents
maximum, and then falls again. The maximum temperature
2
2.1 ASTM Standards:
attained after crystallization begins is the solidification point of
D1493 Test Method for Solidification Point of Industrial
bisphenol A.
3
Organic Chemicals (Withdrawn 2004)
5. Significance and Use
D4297 Practice for Sampling and Handling Bisphenol A
(4,4' -Isopropylidinediphenol)
5.1 The solidification point of bisphenol A is a direct
D6809 Guide for Quality Control and Quality Assurance
indication of its purity, although it gives no information as to
Procedures for Aromatic Hydrocarbons and Related Ma-
the nature of any impurities present.
terials
5.2 High purity bisphenol A has a solidification point of
E1 Specification for ASTM Liquid-in-Glass Thermometers
approximately 157°C.
5.3 This test method can be used for internal quality control
or for setting specifications.
1
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
6. Interference
Subcommittee D16.02 on Oxygenated Aromatics.
Current edition approved June 1, 2012. Published June 2012. Originally
6.1 BisphenolAthat is not stored or packaged properly may
approved in 1985. Last previous edition approved in 2008 as D4493 – 08. DOI:
adsorb moisture. Adsorbed moisture will lower the solidifica-
10.1520/D4493-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or tion point.
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
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D4493 − 12
7. Apparatus 9. Hazards
7.1 Nessler Tubes, borosilicate, 100 mL, short form, 32-mm 9.1 Consult current OSHA Regulations, supplier’s Material
diameter. Safety Data Sheets, and local regulations for all materials used
in this test method.
7.2 Electric Heat Block, thermostatically controlled, ca-
pable of reaching 170°C; having flat-bottom holes 34 mm in 9.2 When handling molten solids in open tubes, adequate
diameter by 172 mm deep. A suitable block is 100 by 110 by ventilation must be provided and proper protection should be
175 mm high, and made of
...
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