Registration Dossier

Ecotoxicological information

Endpoint summary

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In contact with water, vanadium is expected to exist primarily in the tetravalent and pentavalent forms. Both species are known to bind strongly to mineral or biogenic surfaces by adsorption or complexing. The chemical formulas of the vanadyl species most commonly reported in water are VO(2+) and VO(OH)(1+), and the vanadate species H2VO4(1-) and HVO4(2-). 

The different reliable studies reported in this dossier are then linked to vanadium element toxicity.

Short term studies carried out on freshwater invertebrates, fish or algae, lead to a similar range of toxicity. The IC50 was between 1.8 and 3.5 mg V/L for Daphnia magna, between 3,17 et 27,8 mg V/L within 96h for fish species and the EC50 for growth rate at 9.5 mg V/L for algae.

For chronic toxicity, several data are reported for fish and invertebrates giving NOEC around 1 mg V/L for reproduction of daphnia and NOEC = 0,041 mg V/L for growth of Jordanella floridae (in which the Authors concluded with a sub- lethal toxicity threshold as a geometric mean of 0,17 and 0,041 : 0,08 mg V/L).

Concerning microorganisms, an activated sludge respiration inhibition test has been carried out with V2O5 and showed an EC10 (3 hours) of 14 mg V/L. This test followed the OECD 209 guideline and was performed under GLP.

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