Registration Dossier
Registration Dossier
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EC number: 249-530-6 | CAS number: 29240-17-3
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 5.2 µg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 4.7 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.52 µg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 3 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 62 µg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 6.2 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:
- 9.3 µg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Three acute endpoints for three different trophic levels are available. The lowest ErC50 is found for algae and is 0.47 mg/L. Two chronic endpoints - for algae and Daphnia are available. The most sensitive species is the algae. The ErC10 was determined to be 0.052 mg/L. A long-term study with Daphnia magna showed that invertebrates are less sensitive than algae (no toxic effects up to and including the highest tested concentration of 10 mg/L WAf (5.4 mg/L mean measured)).
The substance is not readily biodegradability and has a log Kow of 3.3.
Acute classification:
The lowest acute endpoint for algae is between 0.1 and 1 mg/L and leads to classification as short-term hazard in Acute Category 1 with an M-factor of 1.
Chronic classification:
The substance is not readily biodegradable and the chronic ErC10 for algae is between 0.01 and 0.1 mg/L. This would lead to a long-term hazard classification as Chronic Category 1 with an M-factor of 1.
Because not all chronic endpoints are available, chronic classification is also based on acute data: with an ErC50 of 0.47 mg/L and the substance being not readily biodegradable, but having a log Kow < 4 the substance would also be classified as Chronic Category 1.
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