Registration Dossier
Registration Dossier
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EC number: 231-335-2 | CAS number: 7493-74-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.133 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 1.33 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.013 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.2 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 2.55 µg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.255 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:
- 0.43 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
Summary of classification relevant data
Biodegradation:
- Readily biodegradable (68% after 28 d, OECD 301 D)
Bioaccumulation:
- log Kow: 2.33 (at 24.7 °C, EU Method A.8, HPLC method)
Acute toxicity:
- Fish: LC50 (96 h) = 0.133 mg/L (geom. mean meas., D. rerio, OECD 203)
- Aquatic Invertebrates: EC50 (48 h) = 2.07 mg/L (geom. mean meas., D. magna, OECD 202)
- Algae: ErC50 (72 h) = 24.9 mg/L (TWA, P. subcapitata, OECD 201)
Chronic toxicity:
- Fish: not available
- Aquatic invertebrates: not available
- Algae: ErC10 (72 h) = 12.7 mg/L (TWA, P. subcapitata, OECD 201)
Classification according to CLP
Acute toxicity data are available for all three trophic levels whereas chronic data are only available for aquatic algae. The substance is considered to be rapidly degradable in the environment and has a low potential for bioaccumulation (Log Kow = 2.33). Fish was found to be the most sensitive species in short term aquatic studies with an LC50 (96 h) of 0.133 mg/L (geom. mean meas.). Data for long-term toxicity is available only for algae with chronic effects above the trigger value of 1 mg/L (ErC10 (72 h) = 12.7 mg/L, TWA). Thus, the test substance needs to be classified and labeled as “Aquatic Acute 1” (H400) according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).
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