Registration Dossier
Registration Dossier
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EC number: 916-331-7 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Abiotic degradation:
Air: Based on estimation with the QSAR model AOPWIN, (version 4.10, EpiSuite 2013, CC(C)C(=O)OC3CC1CC3C2CC=CC12), Cyclabute undergoes in air rapid degradation after reaction with hydroxyl radicals or ozone. The DT50 values of the substance after reaction with hydroxyl radicals and ozone are 1.9 hours and 1.4 hours, respectively. This estimated half-life time is much shorter than 2 days, which is the cut off time for reaching the stratosphere. Cyclabute is therefore not expected to reach the stratosphere and is not a long-range transported chemical in air.
Cyclabute does not have an ozone depletion potential because it does not contain halogens and does not have the potential to reach the stratosphere EU CLP (EC no 1272/2008 and its amendments).
Water: The abiotic degradation in water of Cyclabute is based on read-across information from a study performed on the structurally related substance Cyclobutanate. This latter substance has a straight butyl chain instead of a branched butyl chain of Cyclabute. In view of this close similarity the hydrolysis information of Cyclobutanate can be used for Cyclabute. The half-life time of Cyclobutanate at 25oC is>1 year at pH 4 and 7, whereas the half-life is determined to be 13 days at pH 9. The same values can be used for Cyclabute.
Additional information
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