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Ecotoxicological information

Sediment toxicity

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In Annex X, Section 9.5.1, of Regulation (EC) No 1907/2006, it is laid down that chronic tests on sediment organisms shall be proposed by the registrant if the chemical safety assessment indicates the need to investigate further the effects on sediment organisms.

According to Annex I of this regulation, the chemical safety assessment triggers further action when the substance or the preparation meets the criteria for classification as hazardous according to Regulation EC 1272/2008 or is assessed to be a PBT or vPvB.

The hazard assessment of the substance reveals neither a need to classify the substance as dangerous to the environment, nor is it a PBT or vPvB substance, nor are there any further indications that the substance may be hazardous to the environment. In addition, indirect exposure to sediment is unlikely since the substance is readily biodegradable (see IUCLID Ch. 5.2.1). For substances being considered as „readily biodegradable“, it can be assumed that they will be biologically degraded within the STP-process. Further a water/sediment biodegradation study demonstrated that TEA will not persist in sediment, as the mineralization half-life was 7.2 d. Based on the short half-life in a water/sediment, exposure to TEA is unlikely.

Based on the low log Kow and the low measured and estimated BCF values, bioaccumulation in aquatic organisms is not to be expected (see IUCLID Ch. 5.3.1). In special cases, if the substance is not entering the STP-process but is readily biodegradable, it can be assumed that it will be rapidly biological degraded in the surface water. As a consequence, a transfer to the sediment compartment is unlikely.

Consequently, no test on sediment organisms is performed. The equilibrium partitioning method has been used for assessing the hazard to sediment organisms.