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Sediment toxicity

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Description of key information

According to Column 2 of REACH Annex X (standard information requirements for substances manufactured or imported in quantities of 1000 tonnes or more) of Regulation (EC) No 1907/2006 “long-term toxicity testing on sediment dwelling organisms shall be proposed by the registrant if the results of the chemical safety assessment indicates the need to investigate further the effects of the substance and/or degradation products on sediment organisms.” According to Guidance on information requirements and chemical safety assessment (Chapter R.7b: Endpoint specific guidance) substances have to be assessed for toxicity to sediment-dwelling organisms that are potentially capable of depositing on or sorbing to sediments to a significant extent. 
Aluminum dross is an inorganic solid, consisting mainly of Aluminum oxide, metallic Aluminum and Aluminum nitride and in accordance with ECHA Guidance Document R.7B sediment toxicity is relevant for substances with log Kow >3 or high adsorption potential or expected binding behaviour. Leakage or drop off from landfills is highly unlikely according to exposure scenarios of Aluminium dross.
Relevant exposure of sediment to Aluminum dross is unlikely regarding its use pattern. Production, handling and use of the material only take place at a small number of industrial sites with no releases of this substance to the environment or to waste water streams and with no probability of any significant release to the environment from products. Even in case of accidental release and exposure, toxicological effects on sediment dwelling organisms can be excluded since the material is not bioavailable.
As a result sediment toxicity testing is not justified and derivation of PNECsediment is non-relevant.

Key value for chemical safety assessment

Additional information

According to Column 2 of REACH Annex X (standard information requirements for substances manufactured or imported in quantities of 1000 tonnes or more) of Regulation (EC) No 1907/2006 “long-term toxicity testing on sediment dwelling organisms shall be proposed by the registrant if the results of the chemical safety assessment indicates the need to investigate further the effects of the substance and/or degradation products on sediment organisms.” According to Guidance on information requirements and chemical safety assessment (Chapter R.7b: Endpoint specific guidance) substances have to be assessed for toxicity to sediment-dwelling organisms that are potentially capable of depositing on or sorbing to sediments to a significant extent.

Aluminum dross is an inorganic solid, consisting mainly of Aluminum oxide, metallic Aluminum and Aluminum nitride and in accordance with ECHA Guidance Document R.7B sediment toxicity is relevant for substances with log Kow >3 or high adsorption potential or expected binding behaviour. Leakage or drop off from landfills is highly unlikely according to exposure scenarios of Aluminium dross.

Relevant exposure of sediment to Aluminum dross is unlikely regarding its use pattern. Production, handling and use of the material only take place at a small number of industrial sites with no releases of this substance to the environment or to waste water streams and with no probability of any significant release to the environment from products. Even in case of accidental release and exposure, toxicological effects on sediment dwelling organisms can be excluded since the material is not bioavailable.

As a result sediment toxicity testing is not justified and derivation of PNECsediment is non-relevant.