Registration Dossier
Registration Dossier
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EC number: 500-191-5 | CAS number: 68082-29-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.004 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.043 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:
- 3.84 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 434.02 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 43.4 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:
- 86.78 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Acute freshwater data was available for three trophic levels, fish, daphnia and algae. Aquatic PNECs were calculated from the lowest L(E)C50 of 4.34 mg/L. The PNECs were as follows:
PNECfreshwater = 0.00434 mg/L
PNECmarine water = 0.000434 mg/L
PNECintermittent = 0.0434mg/L
The PNEC for the STP was calculated from a respiration inhibition test EC50 of 384 mg/L.
PNECstp = 3.84 mg/L
For soil and sediment PNECs the equilibrium partitioning method is used. EPM PNECs were calculated in EUSES with the following key inputs:
KOC: 1,000,000 (EUSES maximum)
Molecular weight: 617.02 g/mol
Vapour pressure: 0 pa (vapour pressure is extremely low so is set to 0 for practical purposes)
Water solubility: 0.00016 (worst case value for equilibrium partitioning).
The PNECs were as follows:
PNEC sediment = 434 mg/kg dw
PNECmarine sediment = 43.4 mg/kg dw
PNECsoil = 86.78 mg/kg/dw
Conclusion on classification
The lowest acute EC50/LC50 derived was 4.34 mg/L. As the test substance is not considered readily biodegradable this leads to a classification of toxic to aquatic organisms - chronic category 2.
H411 - toxic to aquatic organisms with long lasting effects.
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