Registration Dossier
Registration Dossier
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EC number: 942-066-1 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Reaction mass of bis(2-propylheptyl) hexanedioate and O6-[2,2-bis[[6-oxo-6-(2-propylheptoxy)hexanoyl]oxymethyl]butyl] O1-(2-propylheptyl) hexanedioate is not expected to be bioaccumulative. Due to their readily biodegradable nature, extensive degradation of the substance in conventional STPs will take place and only low concentrations are expected to be released into the environment. Once present in the aquatic compartment, further biodegradation will occur. Based on high log Pow, low water solubility and high adsorption potential, the main components Bis(2-propylheptyl) hexanedioate and O6-[2,2-bis[ [6-oxo- 6-(2-propyl heptoxy)hexanoyl]oxymethyl]butyl] O1-(2-propylheptyl) hexanedioate might be bioavailable to aquatic organisms such as fish only by oral uptake adsorbed on suspended organic particles. After uptake in fish, extensive and fast biotransformation of the main constituents by carboxylesterases into adipic acid, trimethylolpropane and via 2-propylheptanol to 2-propylheptanoic acid is to be expected. The alcohol is used by these organisms as their main source of energy throughout all the different life stages (early development, growth, reproduction, etc.). Adipic acid does not have the potential to accumulate in adipose tissue due to their low log Pow. The key study with the suitable read across substance reports a BCF value of 27, which clearly indicate that rapid metabolism takes place even when log Pow values are above the trigger value of 4.5. Supporting BCF/BAF values estimated using BCFBAF v3.01 confirm the experimental result for the main constituents and the degradation products of the test substance (all well below 2000).
The information above provides strong evidence supporting the statement that rapid metabolism and low bioaccumulation potential can be expected for the main constituents and the expected metabolites of Reaction mass of bis(2-propylheptyl) hexanedioate and O6-[2,2-bis[[6-oxo-6-(2-propylheptoxy)hexanoyl]oxymethyl]butyl] O1-(2-propylheptyl) hexanedioate.
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