ASTM D4877 - 19

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

    Active Standard ASTM D4877 | Developed by Subcommittee: D20.22

    Book of Standards Volume: 08.02


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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. Scope

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D883 Terminology Relating to Plastics

    D1193 Specification for Reagent Water

    D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)

    D4890 Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols

    D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry

    E456 Terminology Relating to Quality and Statistics

    E2935 Practice for Conducting Equivalence Testing in Laboratory Applications


    ICS Code

    ICS Number Code 71.080.30 (Organic nitrogen compounds); 83.040.30 (Auxiliary materials and additives for plastics)

    UNSPSC Code

    UNSPSC Code 12352100(Organic derivatives and substituted compounds)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D4877-19

    Citation Format

    ASTM D4877-19, Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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