Tris(pentane-2,4-dionato-O,O')vanadium

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

3.4 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

34 µg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.34 µg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

3.4 µg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

7.52 mg/L

Assessment factor:

100

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

9.55 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.955 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

PNEC soil

PNEC value:

0.123 mg/kg soil dw

Assessment factor:

1 000

Extrapolation method:

assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Conclusion on classification

Classification is based on biodegradation, bioaccumulation and aquatic toxicity data (acute and chronic). Since long-term values are only available for one trophic level (aquatic invertebrates), the classification scheme outlined in Table 4.1.0(b) (ii) and Table 4.1.0(b) (iii) of Regulation (EC) No 1272/2008 was followed.

 

Biodegradation: As the substance is inorganic, biodegradation is not applicable and a study on ready biodegradation in water does not need to be conducted. However, as the substance is hydrolytically unstable with a half-life < 1h at pH 1.2, 4, 7 and 9 the substance is assumed to be rapidly degradable / eliminated very fast from the aquatic environment.

LogKow: As the substance is inorganic a study for the determination of the partition coefficient does not need to be conducted. However, as the substance is hydrolytically unstable with a half-life < 1h at pH 1.2, 4, 7 and 9 it is assumed that the log Kow is not ≥ 4.

In the following aquatic acute toxicity based on RA key data and identified as worst-case values for the classification of the parent compound Vandium-tris-acetylacetonate is listed:

For fish:

LC50(96h) freshwater = 19.8 mg VAA/L (Brachydanio rerio (zebrafish), semi-static, for NaVO3)

LC50 (96h) marine = 83.6 mg VAA/L (Limanda limanda (Dab), flow-through, for NH4VO3)

For aquatic invertebrates:

EC50 (48h) freshwater = 23.9 mg VAA/L (Daphnia magna, static, for NaVO3)

EC50 (48h) marine = 68.4 mg VAA/L (Nereis diversicolor (annelid), semi-static, NaVO3)

For algae:

TT (24h) freshwater = 2.7 mg/L (Scenedesmus quadricauda, for 2,4 -pentanedione)

EC50 (9d) marine = 3.4 mg VAA/L (Dunaliella marina, for NaVO3)

Based on these data it can be concluded that Vanadium-tris-acetylacetonate does not warrant classification as acute or chronic toxic to the environment according to Regulation (EC) No 1272/2008 (CLP Regulation).