Registration Dossier
Registration Dossier
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EC number: 263-171-2 | CAS number: 61791-39-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.084 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.84 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.008 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 2.8 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.055 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.005 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:
- 0.011 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 4 mg/kg food
- Assessment factor:
- 300
Additional information
Conclusion on classification
The substance is classified for the environment based on the results of acute toxicity studies in fish, Daphnia and algae.
The results of the acute toxicity studies are shown below:
Acute toxicity to fish: 96 -hour LC50 0.4 mg/L; 96-hour LOEC: 0.37 mg/L; 96-hour NOEC: 0.17 mg/L
Acute toxicity to Daphnia: 48-Hour EC50 0.098 mg/l; 48-Hour NOEC 0.056 mg/l
Acute toxicity to algae (growth): 72 -hour EC50: 0.084 mg/l; 72 -hour NOEC: 0.022 mg/l
Acute toxicity to algae (biomass): 72 -hour EC50: 0.049 mg/L
All studies showed effects, the most sensitive species being the algae with a growth rate EC50 result of 0.084 mg/l.
According to CLP classification criteria a substance requires classification where acute toxicity results indicate toxicity at levels < 1 mg/l. As all three species showed toxicity below 1 mg/l the substance can be considered to be classified as Acute Category 1 (Acute (short-term) aquatic hazard.
Furthermore biodegradation studies indicate that although the substance shows possible inherent biodegradability, the material cannot be considered to be readily biodegradable. The substance also has a log Pow of 5.4, indicating that it may have the potential to bioaccumulate in the environment.
Therefore the substance is also classified for Chronic (long-term) aquatic hazard, as Chronic Category 1.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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