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Sediment toxicity

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Description of key information

Key value for chemical safety assessment

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In Annex IX of Regulation (EC) No 1907/2006, it is laid down that long-term toxicity testing 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 dangerous according to Directive 67/548/EEC or Directive 1999/45/EC or is assessed to be a PBT or vPvB.


The hazard assessment of tBMA reveals that it is no PBT or vPvB substance. Furthermore, due to the physico-chemical properties of the substance and its ready biodegradability under enhanced conditions following OECD criteria (68% in 60 days, OECD 310), a considerable exposure of the sediment compartment is unlikely.


Therefore, a long-term toxicity study in sediment organisms is not provided. The PNEC sediment can be estimated based on the equilibrium partitioning method.