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Ecotoxicological information

Sediment toxicity

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Description of key information

The 28-Day EC50(reduction in emergence) and 28 EC50 (reproduction) measured in sediment-dwelling larvae of Chironomus riparius and sediment-dwelling oligochaete, Lumbriculus variegatus.  The 28-Day EC50(reduction in emergence) and 28 EC50 (reproduction) based on nominal test concentrations was greater than 1000 mg/kg. The No Observed Effect Concentration was equal to or greater than 1000 mg/kg.

Key value for chemical safety assessment

EC50 or LC50 for freshwater sediment:
1 000 mg/kg sediment dw
EC10, LC10 or NOEC for freshwater sediment:
1 000 mg/kg sediment dw

Additional information

Data from two studies are available to assess the toxicity of the test item to the sediment-dwelling larvae of Chironomus riparius and sediment-dwelling oligochaete, Lumbriculus variegatus.

The methods followed recommendations of the OECD Guidelines for Testing of Chemicals No. 218 (April 2004) "Sediment-Water Chironomid Toxicity Test using Spiked Sediment" and method of the OECD Guidelines for the Testing of Chemicals (2004), "Sediment-water LumbriculusToxicity Test using Spiked Sediment", OECD Guideline No. 225, October 2007 respectively. All data were gatheredin accordance with the Principles of Good Laboratory Practice (GLP) and reported with a valid GLP certificate.

 

Both studies were conducted over a 28-day exposure period at a nominal equivalent to 1000 mg/l. All measured concentrations were shown to be ≥90% of starting concentrations. 

 

The 28-Day EC50(reduction in emergence) and 28 EC50 (reproduction) based on nominal test concentrations was greater than 1000 mg/kg. The No Observed Effect Concentration was equal to or greater than 1000 mg/kg.