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    STP1579

    Inorganic Powders Used in Agricultural Formulations

    Published: 2014


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    Abstract

    Inorganic powders are widely used in pesticide formulations. They can be up to 80 % of formulations, such as dusts, wettable powders, dry flowables, and water dispersible granules (WDGs). These inorganics come in a variety of chemical structures. The two major classes can be described as clays and silicon oxides. Clay examples are montmorillonite, attapulgite, talc, pyrophyllite, and kaolin. Silicon oxide examples are diatomaceous earth, precipitated silica, and fumed silica. The clay class can be further subdivided; montmorillonite and attapulgite area considered 2:1 layer silicates, while talc, pyrophyllite, and kaolin are 1:1 layer silicates. This paper will describe the central chemical constituencies, crystalline structures, physical properties, and some performance characteristics of these varied formulation constituents.

    Keywords:

    pesticide formulation, inorganic powders, clays, silicon oxides, physical properties


    Author Information:

    Esposito, Nicholas
    Oil-Dri Corporation of America, Chicago, IL

    Bernal, Yasmith
    Oil-Dri Corporation of America, Chicago, IL

    Goss, G. Robert
    Oil-Dri Corporation of America, Chicago, IL


    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP157920130186