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Ecotoxicological information

Sediment toxicity

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Reference
Endpoint:
sediment toxicity: long-term
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
The calculated PEC/PNECs based on the EPM method all being < 1 as shown in the CSR is appropriate information to demonstrate, that tests on sediment organisms are not required.

Description of key information

Key value for chemical safety assessment

Additional information

According to Annex X, section 9.5.1., column 2, to REACH long-term toxicity tests for sediment organisms shall be proposed if the result of the chemical safety assessment indicates the need to investigate further the effects of the substance. According to “Guidance on information requirements and chemical safety assessment Chapter R.7b: Endpoint specific guidance”, Section 7.8.14 Integrated Testing Strategy for toxicity to sediment (ECHA, 2017), the main property of a substance that triggers the assessment for the sediment compartment is the potential to adsorb or bind onto sediment. A log Kow of 3 should be used as trigger value for a sediment assessment. The substance Sulfuric acid, mono-C12-14 (even numbered)-alkyl esters, ammonium salts exhibits low potential for adsorption to sediment (log Kow = 0.8 at 22°C). Additionally this is confirmed by the adsorption coefficient (experimental value) of log Koc 2.5 – 3.19.

Moreover, the risk for sediment organisms was calculated based on the equilibrium partitioning method (EPM). The PEC/PNEC ratios for the sediment compartment are below one. Taking all the available information mentioned above into account long-term sediment tests with benthic species are not required.