ASTM-D4471 Historical Revision Information
Pyridine Bases in Cresylic Acid by Direct Titration, Standard Test Method For

ASTM-D4471 - 1985 EDITION - SUPERSEDED
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Standard Test Method for Pyridine Bases in Cresylic Acid by Direct Titration
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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Superseded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