Registration Dossier
Registration Dossier
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EC number: 202-848-9 | CAS number: 100-40-3
Endpoint summary
Administrative data
Description of key information
Additional information
According to a Mackay Level I model calculation the main target compartments for 4-vinylcyclohexene will be the atmosphere (99.79 %) followed by water (0.09 %). The calculated Henry’s Law constant of 4540 Pa m³/mol at 25 °C indicates high volatility of 4-vinylcyclohexene from surface waters. With a calculated Koc of 517.8 l/kg, the sorption potential of 4-vinylcyclohexene to soil or sediment organic matter is expected to be moderate (Blume scale).
The QSAR calculated rate constant for the OH sensitized photodegradation of 4-vinylcyclohexene is approximately 8.93E-11 cm³/(molecule * s). At 500,000 OH radicals / cm³ (approximate 24-hour mean in central) this corresponds to a half-life of 4.3 hours. The ozone sensitized photodegradation of 4-vinylcyclohexene is even faster, lowering the overall half-life in air to approx. 2 hours. 4-vinylcyclohexene was found not readily biodegradable but ultimate biodegradation is expected. 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 4-vinylcyclohexene is log Kow = 3.93, indicating a moderate potential for bioaccumulation.
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