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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Description of key information

28-d EC10 = 2 mg V/kg soil dw (OECD 220, Enchytraeus crypticus, reproduction)

28-d EC10 = 22 mg V/kg soil dw (OECD 222, Eisenia fetida, reproduction)

56-d LC50 = 340 mg V/kg soil dw (OECD 222, Eisenia fetida mortality)

Corrected for the molecular weight of divanadyl pyrophosphate (CAS no. 65232 -89 -5): E. crypticus: 28-d EC10 = 6 mg/kg soil dw; E. fetida: 28-d EC10 = 66.5 mg/kg soil dw; 56-d LC50 = 1027 mg/kg soil dw

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
1 156 mg/kg soil dw
Long-term EC10, LC10 or NOEC for soil macroorganisms:
6.8 mg/kg soil dw

Additional information

No data are available for the toxicity of vanadylhydrogenphosphate-hemihydrate (CAS 93280 -40 -1) to terrestrial organisms. Therefore, data available for other vanadium compounds is used in a read-across approach.

Two OECD guideline studies are available for the effects of sodium metavanadate (CAS 13718 -26 -8) to Eisenia fetida (OECD 222) and Enchytraeus crypticus (OECD 220) (Lanno, 2016; Ohio University). The studies were performed under GLP. The worms were exposed to spiked natural soils which were tested immediately after spiking and also after ageing. Test concentratinos were verified using ICP-OES after aqua regia digestion of the soil samples. The results are based on Vanadium concentrations.

A further study is disregarded as the test substance was applied only to the surface of the soil in the test vessels, but was not mixed into the soil.

An overview on the results is given in the following table.

For the assessment of the toxicity of vanadylhydrogenphosphate-hemihydrate (CAS no. 93280-40-1), the effect value based on the vanadium concentration must be corrected for the molecular weight of vanadylhydrogenphosphate-hemihydrate (29.4% V). The corrected effect values are given above (see “Description of key information”).

Species

Guideline

Duration

Effect

value

Freshly spiked

(mg V/kg soil dw (meas.))

Aged

(mg V/kg soil dw (meas.))

Soil

Eisenia fetida

OECD 222

28 d

LC50

340

-

Zwijnaarde

Eisenia fetida

OECD 222

56 d

EC10

-

22

Hygum

Enchytraeus crypticus

OECD 220

28 d

EC10

2

-

Zwijnaarde

Enchytraeus crypticus

OECD 220

28 d

EC10

19

51

Pustnäs

Enchytraeus crypticus

OECD 220

28 d

EC10

54

81

Säby

Enchytraeus crypticus

OECD 220

28 d

EC10

22

17

Hygum