ASTM - D4877
Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
|Publication Date:||1 August 2019|
|ICS Code (Auxiliary materials and additives for plastics):||83.040.30|
|ICS Code (Organic nitrogen compounds):||71.080.30|
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)
The values stated in SI units are to be regarded as standard.
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.
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.
2 See Standard Methods for the Examination of Water, Sewage, and Industrial Wastes, AM. Public Health Assn., 1015 15th St. NW Washington, DC 20005.
*A Summary of Changes section appears at the end of this standard