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Tetraesters of pentaerythritol with 2-ethylhexanoic acid, heptanoic acid and nonanoic acid (EC 806-879-4) is characterised by a low vapour pressure (VP < 0.001 Pa at 20 °C, SPARC (v4.6)), a low water solubility (< 0.15 mg/L at 20 °C) and a high log Koc indicating a high adsorption potential to soil and sediment particles (log Koc > 5, MCI method, KOCWIN v2.00). Based on the result from a standard guideline study, the substance is readily biodegradable (73% after 28 d (OECD 301F). Thus, it is expected that an extensive elimination of the substance in sewage treatment plants will occur. In the case insoluble chemicals enter a standard Sewage Treatment Plant (STP), they will be extensively removed in the primary settling tank and fat trap and thus, only limited amounts will get in contact with activated sludge organisms, according to the Guidance on information requirements and chemical safety assessment, Chapter R.7b (ECHA, 2014). As a result of the high adsorption potential of the substance (log Koc > 5, MCI method, KOCWIN v2.00) a removal from the water column to a significant degree by adsorption to sewage sludge can be expected (Guidance on information requirements and chemical safety assessment, Chapter R.7b, (ECHA, 2014). In conclusion, the concentration of the substance in conventional STP effluents is presumably marginal. Abiotic degradation via hydrolysis is considered as not relevant for the substance. The substance is not volatile (VP < 0.001 Pa at 20 °C) and thus evaporation to the air and subsequent transport through the atmosphere to other environmental compartments is not likely. However, if the substance is released into air, the substance is susceptible to indirect photodegradation in air by OH-radicals as half-lives of less than 24 hours were calculated for the main components of the substance (Mayer, 2015). Based on the low water solubility and metabolism via enzymatic hydrolysis of the substance a relevant uptake and bioaccumulation in aquatic organisms is not expected. The substance will be hydrolysed and the cleavage products can be further metabolised. In conclusion, bioaccumulation and biomagnification through the food chain of the substance is not expected. This is supported by (Q)SAR calculations using BCFBAF v3.01 (Arnot-Gobas, including biotransformation, upper trophic) resulting in BCF/BAF values of 0.893 - 0.894 L/kg ww. Please refer to IUCLID Section 5.3 for a detailed overview on bioaccumulation of the substance.

As it can be seen in the data matrix of the analogue justification in IUCLID Section 13, all reliable data from the target and the source substance support the read-across by showing a consistent pattern of results.

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