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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

The substance is inorganic. Biodegradation is not an applicable endpoint for Aluminium dross. According to Column 2 of REACH Annex VII, the Ready Biodegradation Test does not need to be conducted if the substance is inorganic.  
Biodegradation is defined as the biologically mediated degradation or transformation of chemicals usually carried out by microorganisms. (Guidance on information requirements and chemical safety assessment - Chapter R.7b: Endpoint specific guidance)
 
According to column 2 of Annex IX (standard information requirements for substances manufactured or imported in quantities of 100 tonnes or more) of Regulation (EC) No 1907/2006 a simulation study on biodegradation in sediment does not need to be conducted if direct and indirect exposure of sediment is unlikely.
 
Production, handling and use of the substance only take place at a small number of industrial sites with low probability of any release from products.
 
Aluminium dross (ALUFLUX) containsaluminium and aluminium-based compounds.The main compounds are inorganic constituents that are insoluble in water .Due to their physico-chemical properties none of the constituents are systemically and biologically available and do not cross biological membranes. The small percentage of soluble, non-toxic salts (KCl and NaCl), pose no significant threat in terms of quantity. Only aluminum nitride reacts in contact with water anddecomposes to ammonia and aluminium hydroxide at a very slow kinetically rate, which pose no significant threat in terms of amounts produced by the reaction.
 
Biologically mediated degradation or transformation of carried out by microorganisms is therefore unlikely to occur.
 
Given the inherent properties of Aluminium dross (ALUFLUX) and the unlikelihood of exposure of sediment to Aluminium dross (ALUFLUX) testing of biodegradation is considered not to be necessary and is not required under Regulation (EC) No 1907/2006 (REACH).

Key value for chemical safety assessment

Additional information

Biodegradation is defined as the biologically mediated degradation or transformation of chemicals usually carried out by microorganisms. (Guidance on information requirements and chemical safety assessment - Chapter R.7b: Endpoint specific guidance)

 

According to column 2 of Annex IX (standard information requirements for substances manufactured or imported in quantities of 100 tonnes or more) of Regulation (EC) No 1907/2006 a simulation study on biodegradation in sediment does not need to be conducted if direct and indirect exposure of sediment is unlikely.

 

Production, handling and use of the substance only take place at a small number of industrial sites with low probability of any release from products.

 

Aluminium dross (ALUFLUX) containsaluminium and aluminium-based compounds.The main compounds are inorganic constituents that are insoluble in water .Due to their physico-chemical properties none of the constituents are systemically and biologically available and do not cross biological membranes. The small percentage of soluble, non-toxic salts (KCl and NaCl), pose no significant threat in terms of quantity. Only aluminum nitride reacts in contact with water anddecomposes to ammonia and aluminium hydroxide at a very slow kinetically rate, which pose no significant threat in terms of amounts produced by the reaction.

 

Biologically mediated degradation or transformation of carried out by microorganisms is therefore unlikely to occur.

 

Given the inherent properties of Aluminium dross (ALUFLUX) and the unlikelihood of exposure of sediment to Aluminium dross (ALUFLUX) testing of biodegradation is considered not to be necessary and is not required under Regulation (EC) No 1907/2006 (REACH).