Registration Dossier
Registration Dossier
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EC number: 443-870-0 | CAS number: 163520-33-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.2 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 2.2 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.022 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.002 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0 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:
- 0.3 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
Classification related key information
Biodegradation in water: DT50 of parent substance in sediment water system: 04 - 3.2 days at 12°C (aerob, US-EPA 162-4, two sediment/water systems).
Bioaccumulation: low bioaccumulation potential based on low Log Pow values of parent compound (Log Pow: 3.8) and metabolites (Log Pow: -2.81 (pH 10) to - 0.18 (pH 4)) and low BCF values of the parent compound (BCF: 24 - 177 L/kg (VEGA 1.1.5; Meylan Model v1.0.3/CAESAR v2.1.14/Arnot-Gobas v1.1.5)).
Acute aquatic toxicity
- Fish: LC50 (96 h): 0.22 mg/L (mean measured, Lepomis macrochirus, OECD 203)
- Aquatic invertebrates: EC50 (48 h): > 0.51 mg/L (mean measured, Daphnia magna, OECD 202)
- Algae: ErC50 (72 h): > 1.26 mg/L (initial measured, Pseudokirchneriella subcapitata, OECD 201)
Chronic aquatic toxicity
- Algae: NOErC (72 h): ≥ 1.26 mg/L (initial measured, Pseudokirchneriella subcapitata, OECD 201)
- Other plants: NOEC (7 d): ≥ 1.478 mg/L (initial measured, Lemna gibba, EPA OPP 123-2)
Classification justification according to CLP
Based on data above, the test substance is considered not rapidly biodegradable. The acute toxicity L(E)C50 is < 1 mg/L. Due to lacking adequate long-term data, long-term hazard classification is based on acute toxicity and environmental fate data . Therefore, the substance needs to be classified and labelled as environmental hazard Acute Cat. 1 and Aquatic Chronic 1 according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).
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