ASTM D3721 - 05(2019)

    Standard Specification for Synthetic Red Iron Oxide Pigment

    Active Standard ASTM D3721 | Developed by Subcommittee: D01.31

    Book of Standards Volume: 06.03

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    This specification covers synthetic red iron oxide pigment for use in paints and coatings manufactured by any of the following: calcination of iron salts, precipitation from iron salts, calcination of synthetic iron oxide, and product of organic reduction. The pigment shall conform to the requirements prescribed for the following: total iron oxide content, sulfur content, moisture and other volatile matter content, organic coloring matter content, coarse particles in dry pigments (total residue retained), matter soluble in water, and pH value. If the pigments are available in a range of colors, the mass color and the tinting strength or character of the tint formed by mixture with a white pigment shall be within the specified limits. The sampling and test methods to determine conformance of the pigments to the specified properties are given.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers synthetic red iron oxide for use in paints and coatings manufactured by any of the following:

    1.1.1 Calcination of iron salts.

    1.1.2 Precipitation from iron salts.

    1.1.3 Calcination of synthetic iron oxide.

    1.1.4 Product of organic reduction.

    1.2 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

    D50 Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese

    D185 Test Methods for Coarse Particles in Pigments

    D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments

    D387 Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller

    D1208 Test Methods for Common Properties of Certain Pigments

    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/D3721-05R19

    Citation Format

    ASTM D3721-05(2019), Standard Specification for Synthetic Red Iron Oxide Pigment, ASTM International, West Conshohocken, PA, 2019,

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