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ASTM D4663-98

Historical Revision

Standard Test Method for Polyurethane Raw Materials Determination of Hydrolyzable Chlorine of Isocyanates

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1.1 This test method determines the hydrolyzable chlorine content of toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, or mixtures of the two. This test method may also be applied to other isocyanates of suitable solubility. (See Note 1.) The main sources of hydrolyzable chlorine in the isocyanates are carbamoyl chloride and dissolved phosgene. Both of these compounds react with alcohols and water, forming ureas, carbamates, carbon dioxide, and hydrochloric acid. (See Note 2.)

1.2 This standard does not purport to address all of the safety problems, 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 hazards statements see Note 3.

Note 1-This test method may be applicable with crude polymeric isocyanates. However, the precision with crude polymeric isocyanates has not been established. Note 2-There is no equivalent ISO standard.

SDO ASTM: ASTM International
Document Number D4663
Publication Date July 10, 1998
Language en - English
Page Count 2
Revision Level 98
Supercedes
Committee D20.22
Publish Date Document Id Type View
April 1, 2020 D4663-20 Revision
May 1, 2015 D4663-15 Revision
March 1, 2004 D4663-10 Revision
July 10, 1998 D4663-98 Revision
March 1, 2004 D4663-98R04 Reaffirmation