Three waterborne wide-spectrum ground-contact DNBP (2-sec-butyl-4,6-dinitrophenol) wood preservative formulations and their performance are presented. Two are double-treatment formulations in which insolubilization and precipitation of the preservative is attained by salt formation or by formation of a water insoluble Cu/NH3/DNBP complex of formula [DNBP]2 [Cu(NH3)2]2 the clarified structure of which is also presented. The third waterborne DNBP formulation is a single treatment water emulsion which has been produced for many years as an herbicide. It underwent ground-contact fungal and termite field tests for more than twenty years: these results are presented, evaluated and discussed.

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