ASTM-D4471 › Historical Revision Information
Pyridine Bases in Cresylic Acid by Direct Titration, Standard Test Method For
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Scope
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 The 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.
1.4 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 7.
Keywords
cresols; cresylic acids; nitrogen bases; phenol; pyridine bases;tar acids; ICS Number Code 71.080.30 (Organic nitrogen compounds)
To find similar documents by ASTM Volume:
06.04 (Paint -- Solvents; Aromatic Hydrocarbons)
To find similar documents by classification:
71.080.30 (Organic nitrogen compounds)
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Document Number
ASTM-D4471-85
Revision Level
1985 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
March 29, 1985
Document Type
Test Method
Page Count
3 pages
Committee Number
D16.02