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ASTM D4661-23

Current Revision

Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates

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1.1 These test methods determine the total chlorine content of aromatic isocyanates used as polyurethane raw materials. The difference between the total chlorine content and the hydrolyzable chlorine content (see Test Method D4663) is a measure of the amount of chlorobenzene, o-dichlorobenzene, and other ring-substituted chlorinated products that are present. Both procedures are applicable to a variety of organic compounds but the amount of sample used is varied. (See Note 1.)

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 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.

Note 1: This standard is identical to ISO 26603.

1.4 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 These test methods are suitable for use for research or for quality control to determine the total chlorine content of aromatic isocyanates. In some instances total chlorine content may correlate with performance in polyurethane systems.

SDO ASTM: ASTM International
Document Number D4661
Publication Date March 1, 2023
Language en - English
Page Count 5
Revision Level 23
Supercedes
Committee D20.22
Publish Date Document Id Type View
March 1, 2023 D4661-23 Revision
Aug. 1, 2018 D4661-18 Revision
Nov. 1, 2013 D4661-13 Revision
Feb. 1, 2009 D4661-09 Revision
Nov. 1, 2003 D4661-03 Revision
July 10, 1998 D4661-98 Revision