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Ecotoxicological information

Ecotoxicological Summary

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Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.214 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
2.14 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.021 µg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
3.16 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
129.68 µg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
12.968 µg/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:
25.747 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The PNEC derivation was as follows justified:


PNEC freshwater sediment:


K_(susp-water) = 151.5


RHO_(susp) = 1150


Conversion factor (wwt -> dwt): 4.6


PNEC_freshwater sediment


= (K_(susp-water) / RHO_(susp)) * PNEC_water * 1000


= (151.5/1150) * 0.214 * 1000


= 28.19 µg/kg wwt


= 129.68 µg/kg dw


 


PNEC marine water sediment:


K_(susp-water) = 151.5


RHO_(susp) = 1150


Conversion factor (wwt -> dwt): 4.6


PNEC_marine water sediment


= (K_(susp-water) / RHO_(susp)) * PNEC_marine water * 1000


= (151.5/1150) * 0.0214 * 1000


= 2.819 µg/kg wwt


= 12.968 µg/kg dw


 


PNEC soil:


K_(soil-water) = 181


RHO_(soil) = 1700


Conversion factor (wwt -> dwt): 1.13


PNEC_soil


= (K_(soil-water) / RHO_(soil)) * PNEC_freshwater * 1000


= (181/1700) * 0.214 * 1000


= 22.785 µg/kg wwt


= 25.747 µg/kg dw

Conclusion on classification

Acute aquatic toxicity:


96 h, LC50 (Danio rerio): >100 mg/L (nominal concentration), >2.11 mg/L (geometric mean measured concentration)


48 h, EC50 (Daphnia magna): >100 mg/L (nominal concentration), >0.484 mg/L (geometric mean measured concentration)


72 h, ErC50 (Pseudokirchneriella subcapitata): 0.214 mg/L (initial measured concentration)


Aquatic chronic toxicity:


72 h, ErC10 (Pseudokirchneriella subcapitata): 0.109 mg/L (initial measured concentration)


Biodegradation: readily biodegradable: 67 % after 28 days (% degradation O2 consumption, OECD 301 D)


Partition coefficient: log Kow = 5.2 at 25 °C


Classification according to CLP


The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. The test substance was found to be readily biodegradable under the test conditions. The most sensitive test for the aquatic compartment was the toxicity test to algae. This study revealed a 72h- EC50 of 0.214 mg/L and the 72h-EC10 of a toxicity to alga and cyanobacteria test with the test substance was determined to be 0.109 mg/L. Based on these results, the substance is classified as short-term (acute) aquatic toxicity Cat. 1 (M-Factor = 1) and is classified as long-term (chronic) aquatic toxicity Cat. 3 according to Regulation (EC) No 1272/2008 (CLP), as amended for the fifteenth time in Commission Regulation (EU) 2020/1182.