Registration Dossier
Registration Dossier
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EC number: 203-265-2 | CAS number: 105-05-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.002 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.018 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 2.5 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.127 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.013 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:
- 0.015 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential to cause toxic effects if accumulated (in higher organisms) via the food chain
Additional information
Conclusion on classification
The available data from the aquatic toxicity studies are as follows:
LC50 (96 h) fish = 1.8 mg/l (nominal concentration) with 95% confidence limits of 1.0 -3.2 mg/l.
EC50 (24 h) Daphnia = 32 mg/l (nominal concentration)
NOEC Daphnia = 0.93 mg/L
ErC50 (72 h) algae = 1.9 mg/l (nominal concentration)
EL50 microorganisms was determined to be >250 mg/L (not used for classification)
Based on the results from the aquatic toxicity (Chronic NOEC or EC x (for crustacea) > 0,1 to ≤ 1 mg/l) and since the substance is not readily biodegradable and has a log Kow of > 4, the substance is classified as follows:
- according to Directive 67/548/EEC the substance is classified as R51/53.
- according to the CLP Regulation 1272/2008 the substance is classified as Aquatic Chronic 2 (Hazard statement: H411)
Based on the lowest L(E)C50 value (1.8 mg/l), the substance does not match the criteria for classification for acute aquatic hazard.
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