Registration Dossier
Registration Dossier
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EC number: 203-910-8 | CAS number: 111-81-9
Bioaccumulation: aquatic / sediment
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.
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