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Sediment toxicity

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In accordance with column 2 of REACH Annex X section 9.5.1, the long-term toxicity testing to sediment organisms shall be proposed depending on the results of the chemical safety assessment. Morpholine is readily biodegradable, is not expected to adsorb to solid soil phase and does not accumulate significantly in organisms. Results from the pelagic studies indicate that morpholine is acutely harmful (EC50 >10 - <= 100 mg/L), but not acutely toxic. The chronic toxicity data from aquatic invertebrates and algae indicate that the NOEC is > 1 mg/L. The equilibrium partitioning method can be used to assess the hazard for sediment organisms.Additionally, all risk characterization ratios (RCR’s) are under 1.0. Therefore, no tests to sediment organisms are provided.