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ASTM D4877-24

Current Revision

Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates

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1.1 This test method measures the color of clear liquids. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the platinum cobalt color standards used.2 (See Test Method D1209 and Note 1.) Suitable isocyanates include toluene diisocyanate, and pure or modified monomeric methylene di(phenylisocyanate).

1.2 The values stated in SI units are to be regarded as standard.

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 and ISO 6271-1 address the same subject matter, but differ in technical content.

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 This test method can be used for research or for quality control to characterize isocyanates used in polyurethane products.

5.2 For toluene diisocyanate, results from this test method can relate to reactivity or performance in polyurethane systems.

SDO ASTM: ASTM International
Document Number D4877
Publication Date Dec. 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee D20.22
Publish Date Document Id Type View
Dec. 1, 2024 D4877-24 Revision
Aug. 1, 2019 D4877-19 Revision
Aug. 1, 2014 D4877-14 Revision
Jan. 1, 2010 D4877-10 Revision
March 1, 2004 D4877-04 Revision
July 10, 1998 D4877-98 Revision