An OD is a non-aqueous suspension concentrate. It combines a very good biological efficacy with an environmental friendly formulation. The active ingredient is dispersed in oils or methylated crop oils.
The main features are :
- no aromatic solvent
- non-aqueous formulation
- non-flammable and low volatility
- higher efficiency
- no labeling issue
|Active ingredient||40 – 200 g/l|
|Emulsifier||100 – 200 g/l|
|Dispersant||50 – 100 g/l|
|Rheology modifier||50 – 100 g/l|
|Stabilizer||1 - 10 g/l|
|Oil or methyl ester||up to 1 liter|
|Particle size||2 – 4 μm|
|Viscosity (Brookfield, #2, 20 rpm||1000 - 1500 cPs|
|Suspensibility||> 90 %|
|Efficacy||Similar to EC|
|Production process||Similar to S.C, water is replaced by oil media|
Why ODs have a bright future
ODs have several advantages over standard formulations.
OD as a replacement for EC
Nowadays ECs are under a strong regulatory pressure to replace toxic and flammable solvents with a less toxic and non flammable solutions. ODs meets these needs: the oil content gives a favorable eco-toxicological profile guarantying a very high biological efficacy:
- Non-toxic and non-flammable formulations.
- Very high biological efficacy.
OD as a replacement for SC
Suspension concentrates are very safe formulations but the aqueous media is normally not ideal to boost the pesticide’s biological efficacy. Growers, as standard practice, add tank mix adjuvants to guarantee a higher performance. OD, with its oil content, guarantees the best biological results. For water sensitive active ingredients, OD represents the sole technical solution to liquid formulation.
- Very safe formulations along with high biological performance.
- Ideal for active ingredients not stable in water.
OD as an alternative to WDG
Water dispersible granules are very safe but quite expensive. Optimal biological efficacy requires adjuvants. OD, with its oil content and better particle size distribution, combines high efficacy with better cost.
- Better efficacy at a lower cost.
Formulation challenges with ODs
OD formulation presents several challenges in production. To obtain a good and stable formulation over time, optimal formulation additives are required in addition to optimum processes. Particular attention must be given to the rheological agent. Its dispersion and activation are key to the stability of the formulation over time.
Some important requirements for additives:
perfectly dispersible in oil
no phase separation
excellent oil emulsification
good coverage and penetration
For good stability over time, the crucial factor is the rheological agent.
This should meet the following properties:
- provide the right yield value
- provide the right viscosity
- be homogeneously dispersed and activated in the formulation
Production process must ensure:
- total activation of the rheological agent
- even distribution through the whole formulation
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