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Environmental fate & pathways

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VOCl3 is retrieved in water under vanadyl or vanadate ions. Vanadium is an essential trace element which is well regulated by organisms. This is confirmed by these two bioconcentration tests that showed very low BCF and that are considered in a weight of evidence approach:

The first test was conducted by Japanese Authorities under Japan Existing chemicals survey program in CSCL with divanadium pentaoxide V2O5.Cyprinus carpio were exposed to V2O5 in freshwater under continuous flow through at concentrations of 5 or 50 µg/L during 28 days. The study followed the OECD 305 guideline with no deviation and was then judged acceptable to showed that V2O5 did not bioaccumulate in fish species. The BCF found with a concentration of 50 µg V2O5/ L in the environment was 13.

The second one is a non-standard protocol in which divanadium pentoxide bioconcentration was tested with American flagfish over one reproduction cycle, during 96 days. BCF varied from 27.9 to 11.6 for 0.041 mg/L to 0.48 mg/L concentrations of vanadium in water. BCF of vanadium is thus at the low end of the range for metals, and the bioaccumulation danger from vanadium thus appears to be low.

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