Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Ecotoxicological information

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.