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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 223-356-0 | CAS number: 3851-87-4
Endpoint summary
Administrative data
Description of key information
Additional information
The Koc for bis(3,5,5-trimethylhexanoyl) peroxide was estimated by means of QSAR (KOCWIN v2.00). Experimental determination is not mandatory under REACH because the substance and its relevant degradation products decompose rapidly (rapid hydrolysis and ready biodegradation).
However, for rapidly hydrolysing substances it is more appropriate to also determine the degree of adsorption of the hydrolysis products (see Guidance on information requirements and chemical safety assessment, Chapter R.7a: R.7.1.15.4).
Accordingly, the Koc value selected for the chemical safety assessment is that estimated for 3,5,5-trimethylhexanoic acid, an identified breakdown product formed during the rapid hydrolysis of bis(3,5,5-trimethylhexanoyl) peroxide. 3,5,5-trimethylhexanoic acid is the environmentally relevant compound, since that with the highest octanol-water partitioning coefficient among the two identifiable breakdown products (log Pow = 3.34; QSAR estimate, see IUCLID section 4.7). Therefore, the properties of 3,5,5-trimethylhexanoic acid govern the environmental fate of any residues of bis(3,5,5-trimethylhexanoyl) peroxide that may end up in the environment.
The Koc that was estimated based on MCI is relatively low (30.38 L/kg), indicating no significant soil adsorption of environmentally relevant substance residues.
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.
