Registration Dossier

Ecotoxicological information

Sediment toxicity

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

No data available.

Key value for chemical safety assessment

Additional information

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 according to OECD criteria. For substances being considered as „readily biodegradable“, it can be assumed that they will be biologically degraded within the STP-process. As the log Koc and log Kow of the substance are below 3, a low adsorption potential is indicated (see IUCLID Ch. 5.4.1). Hence, an adsorption to activated sludge, suspended matter or sediment particles is unlikely. Based on the low log Kow and the low 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.

In Annex XI Section 3, it is laid down that testing in accordance with sections 8.6 and 8.7 of Annex VIII and in accordance with Annex IX and Annex X may be omitted, based on the exposure scenario(s) developed in the Chemical Safety Report (“Substance-Tailored Exposure-Driven Testing”). In accordance with Annex XI Section 3, it can be demonstrated in the risk assessment that the manufacture and the use of the substance do not pose an unacceptable risk for all environmental compartments as the risk characterization ratios (RCRs) of the chemical safety assessment are below 1 for all compartments (see Chemical Safety Report Ch. 10). 

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