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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 271-739-6 | CAS number: 68606-29-1 A complex combination of hydrocarbons produced during butylene concentrate production. It consists predominantly of C4 and C8 hydrocarbons.
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Based on the WAF the LC50 of tetrabutene was reported to be >1.55 mg/l
Key value for chemical safety assessment
Additional information
Toxicity data was available for tetrabutene (Oxeno Olefinchemie 2008) which reported the WAF LC50 to be >1.55 mg/l. This is supported by data estmated using an established QSAR (ECOSAR, model in EPISuite V4.0) the 96hr LC50 to fish was calcualted to be 0.0011 - 1.19 mg/L for members of this category.
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