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Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.032 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.003 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
1.4 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.092 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.166 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
0.01 g/kg food
Assessment factor:
90

Additional information

The aquatic PNEC is based on study results whereas PNEC sediment and PNEC soil were calculated using the equilibrium partitioning method. Furthermore, PNEC stp was assessed using a study result and the PNEC oral was determined based on toxicological results.

Conclusion on classification

Classification is based on results for Daphnia magna, as daphnids are the most sensitive aquatic organisms. Many studies on short term toxicity to aquatic invertebrates are summarised in the BUA report (BUA 1990). In table 55 in the BUA report either immobilisation or mortality data for Daphnia magna are reported from studies published between 1980 and 1987. Ten LC50/EC50 values were obtained in closed systems. One study resulted in an EC50 of 0.59 mg/L, nine studies showed LC50/EC50 values between 4.3 and 140 mg/L. The only test, in which the test concentrations were analytically verified, yielded an EC50 of 26 mg/L. Due to "weight of evidence" it is assumed that current classification with respect to the toxicity to aquatic organisms is R 51. This is in agreement to the discussions on the environmental effects classification in the Commission Working Group 3-5 April 1995 (European Commission (1995). Summary record: Commission Working Group on the Classification and Labelling of dangerous substances: Environmental Effects. ECBI/39/95, Rev. 1).