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EC number: 204-066-3
CAS number: 115-11-7
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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