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Long-term toxicity to aquatic invertebrates

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In Annex IX of Regulation (EC) No 1907/2006, it is laid down that long-term toxicity tests shall be proposed by the registrant if the chemical safety assessment indicates the need to investigate further the effects on aquatic invertebrates. 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 (Z)-3,7-Dimethylocta-2,6-dienal 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. Furthermore (Z)-3,7-Dimethylocta-2,6-dienal has been identified as a class 3 type compound (Vinyl/Allyl ketone) according to Verhaar (1992). Thus, the mode of action is assumed as unspecific reactive. For these MoA class an a/c-ratio (90 -percentile) of 31.7 is reported by ECETOC (Technical report No. 91). Taking this into account it can be concluded, that - considering an a/c-ratio <100 - it is unlikely that a long-term daphnia study would decrease the PNEC (relative to the PNEC from acute studies with an AF of 1000) and thus not significantly change the risk assessment. Furthermore the substance is readily biodegradable.

Therefore a long-term toxicity testing in Daphnia magna is not provided.