ASTM D4789-20e1

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.
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Designation: D4789 − 20
Standard Test Method for
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Solution Color of Bisphenol A (4,4'-Isopropylidenediphenol)
This standard is issued under the fixed designation D4789; 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.
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ε NOTE—Research report information in Section 12 was updated editorially in February 2021.
1. Scope* -Isopropylidinediphenol)
D6809 Guide for Quality Control and Quality Assurance
1.1 This test method covers the procedure for determination
Procedures for Aromatic Hydrocarbons and Related Ma-
of the Platinum-Cobalt Color of bisphenol A (4,4'-
terials
Isopropylidenediphenol) dissolved in methanol.
E29 Practice for Using Significant Digits in Test Data to
1.2 This test method has been found applicable for the
Determine Conformance with Specifications
determination of solution color of bisphenol A to 20 Pt–Co
E691 Practice for Conducting an Interlaboratory Study to
color units.
Determine the Precision of a Test Method
1.3 The following applies for the purposes of determining 2.2 Other Documents:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
the conformance of the test results using this test method to
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applicable specifications, results shall be rounded off in accor- 1910.1200
dance with the rounding-off method of Practice E29.
3. Summary of Test Method
1.4 The values stated in SI units are to be regarded as
3.1 Bisphenol A is dissolved in methanol. This solution is
standard. No other units of measurement are included in this
then transferred to a color comparison tube and the color
standard.
compared to that of the Platinum-Cobalt Color Standards,
1.5 This standard does not purport to address all of the
either visually or by means of a spectrophotometer. The color
safety concerns, if any, associated with its use. It is the
is reported as that closest to the applicable standard.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 Color is caused by impurities in the bisphenol A. The
For specific hazard statements, see Section 8.
acceptable amount of color depends on the end-use of the
1.6 This international standard was developed in accor-
bisphenol A.
dance with internationally recognized principles on standard-
4.2 Thistestmethodcanbeusedforinternalqualitycontrol.
ization established in the Decision on Principles for the
This method provides the information required to set specifi-
Development of International Standards, Guides and Recom-
cations.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Interferences
5.1 The presence of any turbidity or haze will affect the
2. Referenced Documents
color reading.
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2.1 ASTM Standards:
5.2 AbisphenolAcolorthatisoff-hue,ortintedwithrespect
D1193 Specification for Reagent Water
to the color standards, may interfere with proper color com-
D4297 PracticeforSamplingandHandlingBisphenolA(4,4'
parison.
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6. Apparatus
This test method is under the jurisdiction of ASTM Committee D16 on
Aromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
6.1 Color Comparison Tubes—Matched Nessler tubes with
bility of Subcommittee D16.02 on Oxygenated Aromatics.
50 mL or 100 mL graduation marks, or both, provided with
Current edition approved Oct. 1, 2020. Published December 2020. Originally
approved in 1988. Last previous edition approved in 2012 as D4789 – 12. DOI:
ground-on, optically clear, glass caps.
10.1520/D4789-20E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
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D4789 − 20
TABLE 2 Platinum-Cobalt Color Standards
6.2 Tube Racks, constructed to keep the tubes upright and to
permit visual comparison of light transmitted through Nessler Color Standard Stock Solution, Color Stand
...