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Significance and Use
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.
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. (See Test Method and .) 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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1: This standard is equivalent to ISO 6271-1:2004.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
ISO StandardsISO 6271-1:2004 Clear liquids--Estimation of colour by the platinum-cobalt scale--Part 1: Visual method Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
UNSPSC Code 12352100(Organic derivatives and substituted compounds)
ASTM D4877-14, Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top