Registration Dossier
Registration Dossier
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EC number: 204-066-3 | CAS number: 115-11-7
Endpoint summary
Administrative data
Description of key information
Additional information
Measured ecotoxicity data are not available for the aquatic toxicity endpoints. In accordance with column 2 of REACH Annex VII and VIII, the acute toxicity tests do not need to be conducted if there are mitigating factors indicating that aquatic toxicity is unlikely to occur. Butenes are gases at standard temperature and pressure and are expected to partition primarily to air; therefore aquatic toxicity tests may not be relevant. In addition, it is technically difficult to maintain aqueous concentrations of gases for toxicity testing. Therefore, in the absence of measured data, the toxicity of butenes has been estimated using a suitable QSAR (Nabholz and Mayo-Bean 2009). The equation used is suitable for non-polar narcotic chemicals. The endpoints calculated here are therefore reasonable estimates of their baseline toxicity.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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