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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 209-008-0 | CAS number: 552-30-7
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with Column 2 adaptation statement of REACH Regulation 1907/2006 Annex IX, information requirement section 9.3.2, a bioaccumulation study need not be conducted if the substance has low potential for bioaccumulation (e.g., log Kow < 3).
Key value for chemical safety assessment
Additional information
The log Kow of trimellitic anhydride (TMA), determined experimentally according to the OECD 117 (HPLC method) is 0.06.
The log Kow of trimellitic acid (TMLA), determined experimentally according to OECD 107 (Shake Flask method) is 0.54.
The log Kow of trimellitic acid (TMLA), estimated at pH= 8 (environment, river) is -4.83.
The US EPA's KOWWIN model predicts a log Kow of 1.95 for TMA and a log Kow of 0.61 for its hydrolysis product TMLA. The log Kow value of ionised forms of TMLA relevant to considerations of environmental exposure is estimated to be negative. All these log10 Kow values lie below the trigger of 3.0 and both TMA and TMLA are therefore expected not to exhibit significant bioconcentration or bioaccumulation tendencies.
Studies of bioconcentration/bioaccumulation are not required for TMA (TMLA).
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.
