Registration Dossier
Registration Dossier
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EC number: 217-031-2 | CAS number: 1724-39-6
Endpoint summary
Administrative data
Description of key information
Additional information
According to a Mackay Level I model calculation the main target compartments for cyclodecanol will be sediment (28.8 %) and soil (28.5 %), followed by hydrosphere (23.1 %) and atmosphere (19.5 %). The calculated Henry’s Law constant of 2.40 Pa m3/mol at 20 °C indicates moderate volatility of cyclododecanol from surface waters. With a calculated Koc of 319.1 l/kg, the sorption potential of cyclododecanol to soil or sediment organic matter is expected to be medium (Blume scale).
The QSAR calculated rate constant for the OH sensitized photodegradation of cyclododecanol is approximately 2.60E-11 cm3/(molecule * s). At 500,000 OH radicals / cm3 (approximate 24-hour mean in central Europe) this corresponds to a half-life of 14.8 hours. Cyclododecanol was found readily biodegradable. Biodegradation and atmospheric OH sensitized photodegradation are expected to be the predominant ways of removal from the environment while photolytical or hydrolytical degradation in surface water are expected to be of minor importance. The partition coefficient 1-octanol/water of cyclododecanol is log Kow = 4.18, indicating significant potential for bioaccumulation.
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