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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

The Partition Coefficient of the test item methyl undec-10-enoate was determined by applying OECD Guideline 117 Partition Coefficient (octanol/ water), HPLC Method. Methyl undec-10-enoate gave five peaks on the chromatogram. All calculated Pow of the five peaks are between 3.6 and 5.3. Since three of said five peaks, which are covering a percentage area of more than 90% , have a log Pow between 4.4 and 5.3, the "true log Pow" supposedly lies in between this range. In any case, methyl undec-10 -enoate has a log Pow higher than 4.0, which is the relevant value for classification purposes of chronic aquatic toxicity properties, as this indicates a certain tendency for bioaccumulation.

EPISuite software was used in order to estimate the bioaccumulation potential of methyl undec-10 -enoate. The results obtained are summarized hereafter:

Log BCF (regression-based estimate): 1.37 (BCF = 23.2 L/kg wet-wt)

Biotransformation Half-Life (days) : 0.229 (normalized to 10 g fish)

Log BAF (Arnot-Gobas upper trophic): 1.98 (BAF = 95.6 L/kg wet-wt)

These values are far below the trigger value of BCF = 500 for classification with respect to chronic aquatic toxicity.

So, based on these calculations, methyl undec-10-enoate is characterized by a low bioaccumulation potential. In addition, it has to be noted that methyl undecylenate is highly volatile when dissolved in water (Calculated Henry's constant around 50 000 Pa.m3.mol-1). Therefore, methyl undec-10-enoate bioaccumulation in aquatic organisms is not a likely scenario.