Registration Dossier
Registration Dossier
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EC number: 905-983-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis
'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' is of low water solubility and readily biodegradable, therefore hydrolysis is not considered as relevant for the environmental fate. In a water solubility study, it was shown, that 'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' was stable for at least 72 hours at 30°C.
Biodegradation
For the registered substance Adimoll BO two experimental studies on ready biodegradability are available. Both studies show, that the multi constituent substance is biodegraded under the given conditions to a degree that is above the pass level for ready biodegradability. In the more recent study (Currenta, 2020) however the 10-day-window criterium is not fulfilled. Based on the structural similarity of the constituents of Adimoll BO and according to ECHA Guidance R.7b (2017, p. 210) the 10-day-window might not be applicable for Adimoll BO. Furthermore, the registrant examined experimental biodegradation data for one constituent of Adimoll BO (Constituent A) as well as closely related supporting substances that serve as representatives for alkyl and benzyl adipates. The experimental data was additionally compared with calculated biodegradation predictions (BioWin v. 4.11) for those substances.
From the discussed information it is concluded that each constituent of Adimoll BO should be regarded as readily biodegradable and therefore despite not fulfilling the 10-day-window in the most recent study (Currenta, 2020) Adimoll BO should be considered readily biodegradable.
Bioaccumulation:
The bioconcentration factor (BCF) of 'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' was predicted using the Estimation Program Interface (EPI) Suite version 4.1.
The estimation yielded a BCF of 358.4 L/kg wwt for benzyl 2-ethylhexyl adipate, a BCF of 957.1 L/kg wwt for bis(2-ethylhexyl) adipate and a BCF of 685.4 L/kg wwt for dibenzyl adipate.
Additionally, bioaccumulation of one constituent of 'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' (bis(2-ethylhexyl) adipate) on Lepomis macrchirus was tested in a flow through test according to American national standard ASTM. For bis(2-ethylhexyl) adipate a whole-fish BCF of 27 was observed, indicating no significant bioaccumulation in fish. Based on this result, it is assumed that also the other two constituents of 'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' (benzyl 2-ethylhexyl adipate and dibenzyl adipate) will not be accumulative.
Adsorptiton / desorption:
The organic carbon partition coefficient (log Koc) of 'Reaction mass of benzyl 2-ethylhexyl adipate and bis(2-ethylhexyl) adipate and dibenzyl adipate' was predicted using the Estimation Program Interface (EPI) Suite version 4.1.
The estimated Koc values in the range of 2811 to 192900 L/kg (log Koc in the range of 3.45 to 5.29) indicate a potential for adsorption.
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.
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