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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-650-5 | CAS number: 109-13-7
Endpoint summary
Administrative data
Description of key information
Additional information
Short-term toxicity to fish
The EC50-96h value obtained for t-butyl peroxy isobutyrate was determined to be 8.7 mg/L . The 96 h-EC50 value corresponding to a solution containing 75 % t-butyl peroxy isobutyrate was estimated to be 11.6 mg/L.
Short-term toxicity to aquatic invertebrates
Under the experimental conditions, the 48-hour EL50 of the test substance (75 % t-butyl peroxy isobutyrate in isododecane) in a static test system is 231 mg/L expressed as initial loading rate, corresponding to 72.5 mg/L expressed as actual concentration (calculated from geometric means of measured concentrations in the saturated solutions obtained from the loading rates tested), for Daphnia magna.
Toxicity to aquatic algae
In an algal inhibition test (used organisms: Pseudokirchneriella subcapitata) the 72h-EC50 (growth rate) and 72h-NOEC (growth rate) of t-butyl peroxy isobutyrate in a static system were determined to be 6.13 mg/L and 0.28 mg/L, respectively.The 72 h-EC50 (growth rate) and 72h-NOEC (growth rate) value corresponding to a solution containing 75 % t-butyl peroxy isobutyrate were estimated to be 8.17 mg/L and 0.37 mg/L, respectively.
Toxicity to microorganisms
The 3-hour EC50 of t-butyl peroxyisobutyrate was determined to be 207 mg/L for activated sludge.
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.
