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ASTM D8032-20

Current Revision

Standard Test Method for Acid Number of Terephthalic Acid by Color-Indicator Titration

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1.1 This test method covers the determination of acid number of terephthalic acid (TA) by color-indicator titration. Acid number of TA product is usually within 674 to 676 mg KOH/g.

1.2 In determining the conformance of the test results using this method, results shall be rounded off in accordance with the rounding-off method of Practice E29.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 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.


5.1 An estimate of TA purity can be determined by titrating with KOH. As an index of TA purity, the acid number can be used as a guide in the quality control of TA production.

SDO ASTM: ASTM International
Document Number D8032
Publication Date Aug. 1, 2020
Language en - English
Page Count 3
Revision Level 20
Supercedes
Committee D16.02
Publish Date Document Id Type View
Aug. 1, 2020 D8032-20 Revision
March 1, 2016 D8032-16 Revision