Registration Dossier
Registration Dossier
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EC number: 292-947-3 | CAS number: 91031-45-7
Endpoint summary
Administrative data
Description of key information
Additional information
Considering the low water solubility (< 0.05 mg/L) and the potential for adsorption to organic soil and sediment particles (log Koc: > 3, MCI method, KOCWIN v2.00), the main compartments for environmental distribution of fatty acids, C16-18, 1,2-ethanediylbis(oxy-2,1-ethanediyl) esters (3EO) (CAS 91031-45-7) are expected to be the soil and sediment based on the intrinsic properties of the substance. Nevertheless, persistency in these compartments is not expected since fatty acids, C16-18, 1,2-ethanediylbis(oxy-2,1-ethanediyl) esters (3EO) is readily biodegradable according to the OECD criteria (OECD 301D; 69 - 79% biodegradation after 30 d).Therefore, it is assumed that the substance is eliminated in sewage treatment plants to a high extent.Release to surface waters, and subsequent exposure of sediment, is therefore very unlikely.Degradation via abiotic hydrolysis is not considered to be a relevant degradation pathway in the environment since QSAR estimations using HYDROWIN v2.00 resulted in DT50 > 1 yr at pH 7.
Evaporation into air and the transport through the atmospheric compartment is not expected since the substance is not volatile based on the calculated low vapour pressure (< 0.0001 Pa). Accumulation in air and the subsequent transport to other environmental compartments is not anticipated. However, if released into air, the substance susceptible to indirect photodegradation by OH-radicals with a DT50: < 24 h (AOPWIN v1.92).
Due to the low water solubility, rapid environmental biodegradation and metabolisation via enzymatic hydrolysis, a relevant uptake and bioaccumulation in aquatic organisms is not expected. Enzymatic breakdown will initially lead to the free fatty acid (palmitic acid and stearic acid) and the free glycol alcohol (triethylene glycol). From literature it is well known, that these hydrolysis products will be metabolised and excreted in fish effectively (Heymann, 1980; Lech & Bend, 1980; Lech & Melancon, 1980; Murphy & Lutenske, 1990). This is supported by low calculated BCF values of 0.893 - 51.86 L/kg ww (BCFBAF v3.01, Arnot-Gobas, including biotransformation, upper trophic). For a detailed overview on bioaccumulation please refer to IUCLID Section 5.3.
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