Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
11.3 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:
18.8 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Three short-term test results (LC50) from each of three trophic levels (fish, daphnia, algae) are available. The lowest value is the 48 -h-LC50 for daphnia with 6.31 mg/L. This value is used for assessment. Tests were made with the Potassium salt (daphnia, algae) respective the Sodium salt (fish) of the registration substance. The justification for this read-across approach is documented within the corresponding endpoint summaries.

The toxicity to microorganisms was tested during a test on readily biodegradability. The respiration of sewage sludge with an reference substance was not inhibited at a registration substance concentration of 100 mg/L.

No hazard to air is identified:

  • no potential for global warming is expected according to the vapour pressure of <0.05 Pa and the molecular weight.
  • no potential for the depletion of the ozonic layer, as the molecule doesn't contain halogens

PNEC values for sediment and soil were calculated with EUSES (equlibrium partitioning method), based on phys.-chem., fate and ecotoxicology data.

Conclusion on classification

The lowes acute EC50 value (daphnia) is in the range 1 -10 mg/L. There are no longterm data on ecotoxicology available. Following test results on biodegradation, no fast degradation was determined. No fast hydrolysis is expected.

Resulting classification:

Hazardous to the aquatic environment, category chronic 2.