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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 282-775-7 | CAS number: 84418-63-3
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not readily biodegradable: 4.3% (CO2 evolution) after 60 d (OECD 301B), read across
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Since no studies investigating the ready biodegradability of 3,5,5 trimethylhexanoic acid, mixed esters with dipentaerythritol (CAS 84418-63-3, UVCB) are available for this endpoint, in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5 a read across to the structurally related source substance 3,5,5-trimethylhexanoic acid hexaester with dipentaerythritol (CAS 84418-63-3, mono-constituent) was conducted. This read-across is justified in detail in the overall summary (IUCLID section 6.1) and within the analogue justification in IUCLID Section 13.
The study with 3,5,5-trimethylhexanoic acid hexaester with dipentaerythritol (CAS 84418-63-3, mono-constituent) was performed according to OECD 301B under GLP conditions (Muckle, 2012). Activated sludge from a sewage wastewater treatment plant was used as inoculum. Microorganisms were exposed to a test substance concentration of 28.5 mg/L (mean) under aerobic conditions for an extended duration of 60 d. The results indicated that the test substance reached a mean degradation of 4.6%. Therefore, the test substance is not ready biodegradable according to the OECD criteria.
Thus, based on the available study from a structurally related read-across substance which is characterized by an equal ecotoxicological profile and a similar structure, it can be concluded that 3,5,5 trimethylhexanoic acid, mixed esters with dipentaerythritol (CAS 84418-63-3, UVCB ) is not readily biodegradable according to the OECD criteria.
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.
