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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Studies on the biodegradability in water and sediment do not need to be conducted because the substance is inorganic.

Key value for chemical safety assessment

Additional information

According to Annex IX, Section 9.2, Column 2 of Regulation (EC) 1907/2006, "Further biotic degradation testing shall be proposed by the registrant if the chemical safety assessment according to Annex I indicates the need to investigate further the degradation of the substance and its degradation products. The choice of the appropriate test(s) depends on the results of the chemical safety assessment."  Degradation/biodegradation testing is not relevant for metals and metal compounds, like vanadylhydrogenphosphate-hemihydrate (CAS no. 93280-40-1), which are considered as not (bio)degradable. Therefore, the chemical assessment of vanadylhydrogenphosphate-hemihydrate (CAS no. 93280-40-1) is based on the total initial vanadium concentration, which can be considered as a worst-case assumption.