Cyclanilide

Fate in soil:
The DT₅₀ for soil photolysis is 151 days at 25°C.
Cyclanilide is degraded by microbes in the soil. In aerobic soil metabolism studies, the major metabolite is 2,4-dichloroaniline (2,4-DCA) at 1.5 - 16% of the applied radioactivity.
The DT₅₀ for laboratory aerobic soil metabolism is 15-49 days (mean = 29 days) at 20°C. The corresponding DT₉₀ is 50-162 days (mean = 96 days).
Under laboratory anaerobic conditions, the DT₅₀ for cyclanilide at 20°C is 15 months or more.
In field dissipation studies in France and Spain, the DT₅₀ for cyclanilide is 11-45 days (mean = 28 days) and the DT₉₀ was 37-151 days (mean = 94 days). In the US, the DT₅₀ was measured at 34-114 days (mean = 65 days).
The Koc for cyclanilide ranges from 194 (loamy sand) to 565 (silty loam), with Kd ranging from 1.05 - 3.83.
Cyclanilide has low to moderate soil persistance and mobility.

Fate in aquatic systems:
Cyclanilide is primarily degraded by microbes in water.
It is not hydrolysed at pH 5,7 or 9. The product does not bioaccumulate in water.
The DT₅₀ for aqueous photostability ranges from 997 hours (pH 5, 9) to 1173 hours (pH 7).
In water / sediment studies, the DT₅₀ for cyclanilide is 17-18 days (water layer) and 56-63 days (whole system). After 105 days, 14-18% of the parent compound is found in the water phase and 13-15% in the soil layer.