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Granule formulation

Water dispersible granule (WDG)

Water dispersible granules (WDGs) are a solid, non-dusty granular formulation which disperses or dissolves quickly when added to water in the spray tank to give a fine particle suspension.

They provide a system for delivering solid active ingredients to a target organism. They allow for the production of highly-concentrated formulations which are wettable and easily disintegrated on contact with water. WDGs are an attractive alternative to wettable powder (WP) formulations due to their reduction in dust production.

WDG formulation diagram

Benefits
  • Non-dusty so reduces inhalation hazard
  • High loading of active ingredient is possible (up to 90%)
  • No crystal growth or sedimentation
  • Package disposal easier to deal with than for liquid formulations

Limitations
  • Granule disintegration suspensibility upon dilution
  • Low melting point active ingredients can be problematic 
  • High processing cost
  • Difficult to include bio enhancing adjuvants in the recipe

The Formulator's Toolbox (Full Version)

The Formulator's Toolbox
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Recommended products for WDG

Before producing the final granules, a paste must be made. Wetting agents help incorporate the liquid components into this paste. They also reduce drying costs after the granules have been made as less water can be used. On dilution in water prior to application, wetting agents help disintegration and prevent nozzle blockage.

Adinol™ OT-72

Adinol™ OT-72

An electrolyte tolerant wetting agent which, due to its solid nature, shows strong performance in granule/powder based formulations. Ideally combined with Atlox Metasperse 550S.

Example formulations

Formulation finder

Browse our formulation finder to view a range of fully developed formulations for inspiration and guidance.

Tea field

Adjuvants

In the agrochemical industry, adjuvants can be incorporated into a formulation (built-in / in-can adjuvant) or can be added separately into the spray tank alongside other agrochemical products.

Sunflower field

Polymeric surfactants

Explore the benefits of using polymeric surfactants and how they can enhance stability even in the most challenging environments.

Speak with our technical experts to find out more about formulating WDGs