Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 903-812-1 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Measured data on aquatic tocicity are not available for the "reaction mass of butane and butene". Due to the practical difficulties associated with the ecotoxicity testing of gases (i.e. maintaining exposure concentrations) the use of QSAR toxicity estimates for the single components is an appropriate alternative. Based on these QSAR calculations green algae is the most sensitive organism (EC50 (96 h) values range from 7.7 mg/L to 10.6 mg/L). For daphnids LC50 (48 h) values between 14.2 mg/L and 22.1 mg/L were calculated and fish showed LC50 (96 h) values between 24.1 mg/L and 39.0 mg/L.
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.
