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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Niobium is insoluble in water and not bioavailable to aquatic species. The substance cannot be absorbed via skin or gastrointestinal tract. Thus, there is no potential for bioaccumulation of niobium.

Key value for chemical safety assessment

Additional information

The defining characteristic of the inorganic diniobium pentaoxide is its insolubility in water. The Diniobium pentaoxide remains stable in water and does not hydrolyse. It cannot be adsorbed and metabolised by living beings but would be excreted and thus does not bioaccumulate.Based on its intended uses (manufacture of superalloys, as a catalyst or to produce lenses) the substance is not expected to enter into the environment by any pathway. The substance is judged to be an inert, harmless substance which according to its uses does not enter the environment. Consequently, environmental effects have never been reported. Additionally, a bioaccumulation test is technically hardly feasible due to the highly insolubility of the substance and is not necessary due to the non-hazardous character of the substance.