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Ecotoxicological information

Sediment toxicity

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Description of key information

No relevant toxity data is available for regulatory compliant risk assessment. Since sediment RCRs < 1 and log Kow/Kow < 3, no toxiticy testing is proposed for this compartment.

Key value for chemical safety assessment

Additional information

The EPM strategy that we applied to sediment follows the rules set out in the integrated testing strategy (ITS) detailed in R.7.8.12, Chapter R.7b of the ECHA Guidance on information requirements and chemical safety assessment (v1.2, Nov. 2012, pp.138 -139). No adequate toxicity datum is available for toxicity of heptanol to sediment organisms. Therefore, the updated freshwater and marine sediment PNECs were derived from their respective aquatic PNECs, using the EPM method. The subsequent calculated RCRs are all inferior to 1 for both compartments and no further testing is therefore required to cover the risk for both sediment compartments. This information is presented in the updated CSA. It has to be noted that both heptanol’s partition (log Kow) and adsorption (log Koc) coefficients are inferior to 3. Consequently, a chemical safety assessment for the sediment compartment was not mandatory, as stated in R.7.8.12.2, Chapter R.7b of the ECHA Guidance on information requirements and chemical safety assessment (v1.2, Nov. 2012, p.140): “The main property of a substance that triggers the assessment for the sediment compartment is the potential to adsorb or bind onto sediment. As trigger value for a sediment assessment, a log Kow of 3 is proposed”. However, a chemical safety assessment is yet provided. It indicates an acceptable risk (all RCRs < 1) for both sediment compartments (both freshwater and marine).