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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

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Administrative data

Description of key information

The rate and extent to which divanadium trioxide produces soluble (bio)available ionic and other vanadium-bearing species in environmental media is limited. Based on results of a standard transformation/dissolution test according to OECD Series No 29, the dissolution at a loading of 1 mg V2O3 powder/L results after 7 days in dissolved vanadium levels of 85 μg/L and 106 μg/L at pH 8 and pH 6, respectively. After 28 days, dissolved vanadium levels are at 100 μg/L at pH 8 and 105 μg/L at pH 6.

Further, the poor solubility of divanadium trioxide is expected to determine its behaviour and fate in the environment, and subsequently its bioavailability and potential for bioaccumulation and ecotoxicity.

Divanadium trioxide at pH 6 and 8, similar to other inorganic vanadium substances, transforms to the higher (V) oxidation state immediately upon dissolution (94% (V(V) after 24 hours) and is retained in pentavalent form (96-97% V(V) after 28 days). Therefore, a read-across approach is applied based on all information available for different inorganic vanadium substances and the fate of the limited vanadium ions released can ultimately be expected to be similar to the common fate of vanadium ions in the environment as described in the endpoint summary "V_Environmental fate and pathways". For further information on the applied read-across approach, please refer to the RAAF document "Read-across approach for environmental toxicity of the vanadium category, 2020" attached in IUCLID Section 13.

Additional information