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Herbicide Formulation Stability Testing: CIPAC Methods Explained
Straight answer
CIPAC stability testing for herbicide formulations involves accelerated storage at 54°C for 14 days (simulating 2-year shelf life), freeze-thaw cycling at -10°C/+25°C for 5 cycles, and ongoing monitoring of active ingredient content, suspensibility, pH and viscosity. Formulations must retain ≥95% of declared active ingredient and show no physical separation after stability conditioning to meet FAO/WHO specifications.
Specifications verified: 2026-08- The Collaborative International Pesticides Analytical Council (CIPAC) publishes the internationally recognized test methods that underpin FAO/WHO pesticide specifications. MT 46 covers accelerated storage testing, MT 39 measures suspensibility of water-dispersible formulations, MT 75 determines emulsion stability, and MT 148 evaluates pourability. These methods are mandatory for ICAMA registration and for meeting import requirements in most regulated markets.
- Agrospear conducts CIPAC stability testing in dedicated environmental chambers at its 20,000 m² facility. Every formulation batch undergoes 54°C/14-day accelerated testing before release, and long-term stability monitoring continues at 25°C and 35°C for ongoing shelf-life verification. The 7-stage QC system integrates CIPAC methods at raw material intake, in-process checks and final release stages.
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