Registration Dossier
Registration Dossier
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EC number: 270-877-4 | CAS number: 68479-98-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.001 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.005 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:
- 17 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.029 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.003 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 5.6 µg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 2 mg/kg food
- Assessment factor:
- 30
Additional information
Conclusion on classification
Classification as "R50 /53 Dangerous for the environment; Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment" was formerly agreed upon at the EU level under the Dangerous Substances Directive. Classification as R50 is based on ecotoxicologal data from daphnia (EC50=0.5 mg/L). However, classification of R53 does not apply according to current status of evaluation. In fact, the substance is not biodegradable, however it does not fulfill the second criterion logPow>3. The measured logPow is 1.16.
The experimental values for aquatic toxicity along with the applied assessment factors ensure that the PNECs are very conservative and protective of organisms in the environment. Using the acute toxicity value of 0.5 mg/L for Daphnia (BayerAG, 1993) and the chronic toxicity estimate for algae, the test substance meets the criteria for Acute Category 1 and Chronic Category 1 hazardous to the aquatic environment. See: Regulation (EC) No 1272/2008; See Official Journal of the European Union, (2008) Vol. L353, pp. 1-1355, at p. 131. However, classification as chronic cat. 1 should not apply according to existing data. The substance is, in fact, not readily biodegradable, but it does not fulfill the second criterion logPow>4 (measured: logPow=1.16).
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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