Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

One experimental study according to OECD 306 confirmed that Reaction mixture of Glycerol 1,3- di(acetate), glycerol acetate and triacetin is readily biodegradable according to the OECD criteria (81 - 108.5% biodegradation after 28 d). Therefore, the substance will not be persistent in the environment. The degradation via abiotic hydrolysis is not considered to be a relevant degradation pathway in the environment since QSAR results using HYDROWIN v2.00 resulted in DT50 > 24 h at pH 7. Considering the high water solubility (≥ 2000 g/L) and the low potential for adsorption to organic soil and sediment particles (log Koc: 0 - 1.61, KOCWIN v2.00), the main compartment for environmental distribution is expected to be the water body. Nevertheless, persistency in this compartment is not expected since the substance is readily biodegradable and it will be therefore ultimately degraded in sewage treatment plants. Evaporation into air and the transport through the atmospheric compartment is not expected since Reaction mixture of Glycerol 1,3- di(acetate), glycerol acetate and triacetin is not volatile based on the low Henry’s Law constant (< 1 Pa m³/mole (HENRYWIN v3.20); Müller, 2011). Accumulation in air and the subsequent transport to other environmental compartments is not anticipated. However, if released into air, the substance is susceptible to slow indirect photodegradation by OH-radicals with a DT50 of 29.48 h - 45.31 h (AOPWIN v1.92). The potential for bioaccumulation of Reaction mixture of Glycerol 1,3- di(acetate), glycerol acetate and triacetin is assumed to be low based on the low log Kow of -1.24 - 0.36.