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Sediment toxicity

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Description of key information

The 10d-LC50 and 10d-NOEC for the marine sediment amphipod Corophium volutator were reported to be respectively 537 and 171 mg/kg sediment (dw) (geometric mean).

However, as long-term data is not available for this end-point, the environmental risk is assessed using the Petrorisk model.

Key value for chemical safety assessment

Additional information

Short-term studies:

The marine amphipod Corophium volutator was exposed to sediment spiked with Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, <2% aromatics for 10 days. Fourteen studies were available and give LC50 values. The geometric mean of LC50 is 537 mg/kg sediment (dw). In most of the studies, LC10 were calculated and the geometric mean of the 12 available values is 112.6 mg/kg sediment (dw). At last, the 7 more recent studies reported NOEC values and the lowest one was 100 mg/kg (dw).

The marine mollusc bivalve Abra alba was exposed to sediment spiked with Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, <2% aromatics for 5 days. Four studies were available and give LC50 values. The 5-day LC50 value ranged from is 36 +/- 11 to 103 +/- 22 mg test substance / kg 8% (dw) standard sediment suspension.

Long-term studies:

No data is available for long-term sediment toxicity.

C14-20 Aliphatics (≤2% aromatic) are hydrocarbon UVCBs. Standard tests for this endpoint are intended for single substances and are not appropriate for these complex substances. However, this endpoint is characterized for representative hydrocarbon structures that comprise the hydrocarbon blocks used to assess the environmental risk of this substance with the PETRORISK model (see library tab in PETRORISK spreadsheet attached in section 13).