Stable Formulation of Easy Hydrolizing Actives Based on Specialty Silicas Shown on Malathion as a Modelling Substance.

    Published: Jan 1997

      Format Pages Price  
    PDF (152K) 7 $25   ADD TO CART
    Complete Source PDF (5.8M) 7 $89   ADD TO CART


    There are some active ingredients (a.i.) such as phosphoresters which can be hydrolyzed by even the small amount of water available from the surface of natural carriers or synthetic silica carriers. Dry formulations, i.e. wettable powders (WP) and dispersible granules (WG), cannot be formulated with these compounds (Ferch et al. 1990). It has been shown, that the controlled hydrophobicity of the surface of a new type of carrier silica can improve the stability of such a.i., thus, enabling the formulator to produce and apply stable WP and WG.


    Formulation, wettable powder, dispersible granule, hydrolysis, natural carrier, silica carrier, hydrophilic, hydrophobic

    Author Information:

    Oelmüller, R
    Manager Applied Technology Silicas, Degussa AG, Hanau,

    Müller, A
    Research Scientist Applied Technology Silicas, Degussa AG, Hanau,

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP13833S

    CrossRef ASTM International is a member of CrossRef.