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Ecotoxicological information

Sediment toxicity

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Description of key information

Due to the properties of the substance a hazard to sediment organisms can be excluded and adverse effects to sediment organisms are not expected

Key value for chemical safety assessment

Additional information

No sediment studies are available but according to column 2 of Regulation (EC) 1907/2006 Annex IX long-term toxicity testing shall only be proposed if the chemical safety assessment indicates the need to investigate further the effects on aquatic organisms. Cenospheres are lightweight, inert, hollow spheres filled with inert air or gas. Because of low density and hollow nature they float in the lagoons where fly ash is discharged. An exposure to sediment is therefore not expected. Additionally, cenospheres are inert, based on the fact that cenospheres are basically glass spheres (molten silica that has recrystallized around a gas bubble) and it is not expected that sediment compartment is a concern for cenospheres.

Due to the properties of the substance a hazard to sediment organisms can be excluded.