ASTM D4450 - 85(2019)

    Standard Test Method for Analysis of Zinc Hydroxy Phosphite Pigment

    Active Standard ASTM D4450 | Developed by Subcommittee: D01.31

    Book of Standards Volume: 06.03

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    Significance and Use

    4.1 This test method may be used to confirm the stated zinc oxide and phosphorous acid content of zinc hydroxy phosphite pigment.

    1. Scope

    1.1 This test method is intended for the determination of zinc oxide and phosphorous acid content of the pigment commercially known as zinc hydroxy phosphite. The zinc content is determined by ethylenediaminetetraacetate (EDTA) titration and calculated as zinc oxide (ZnO), while the phosphorus content is determined colorimetrically and calculated as phosphorous acid (H3PO3).

    1.2 The analytical procedures appear in the following order:




    Zinc oxide

    6 through 8

    Phosphorous acid

    9 through 14

    1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.4 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.

    1.5 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

    D1193 Specification for Reagent Water

    ICS Code

    ICS Number Code 87.060.10 (Pigments and extenders)

    UNSPSC Code

    UNSPSC Code 31211503(Pigment paints)

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

    DOI: 10.1520/D4450-85R19

    Citation Format

    ASTM D4450-85(2019), Standard Test Method for Analysis of Zinc Hydroxy Phosphite Pigment, ASTM International, West Conshohocken, PA, 2019,

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