Registration Dossier
Registration Dossier
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EC number: 204-110-1 | CAS number: 115-83-3
Endpoint summary
Administrative data
Description of key information
Additional information
The target substance pentaerythritol tetrastearate (CAS 115-83-3) is characterized by a low vapour pressure (< 0.0001 Pa at 20 °C), a low water solubility (< 0.513 mg/L) and a log Koc indicating a high adsorption potential to soil and sediment particles (19.81 (MCI method); 18.65 (based on log Kow), KOCWIN v2.00). Based on the result from structurally related source substances, the target substance is readily biodegradable. Thus, it is expected that an extensive elimination of the substance in sewage treatment plants will occur. Moreover, 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, 2017). As a result of the high adsorption potential of the substance (log Koc > 5, MCI, 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, 2017)). 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. Moreover, the substance is not volatile (vapour pressure < 0.0001 Pa at 20 °C) and thus evaporation to the air and subsequent transport through the atmosphere to other environmental compartments is not likely.
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