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ASTM D4471-22

Current Revision

Standard Test Method for Pyridine Bases in Cresylic Acid by Direct Titration

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1.1 This test method covers the determination of pyridine and other basic nitrogen impurities in crude and refined cresylic acids streams, including mixtures.

1.2 This test method is applicable for pyridine base levels of 0.001 % to 0.5 %.

1.3 In determining the 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.

1.6 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 The pyridine base content of cresylic acids is important in certain applications. This test method may be used as a tool for quality control and specification purposes by producers and users.

SDO ASTM: ASTM International
Document Number D4471
Publication Date May 1, 2022
Language en - English
Page Count 4
Revision Level 22
Supercedes
Committee D16.02
Publish Date Document Id Type View
May 1, 2022 D4471-22 Revision
June 1, 2018 D4471-18 Revision
Jan. 1, 2010 D4471-10 Revision
Jan. 10, 2000 D4471-00 Revision
June 1, 2004 D4471-00R04 Reaffirmation