Registration Dossier
Registration Dossier
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EC number: 234-277-6 | CAS number: 11059-65-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 75 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 750 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 7.5 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 16.5 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.06 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.006 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:
- 0.02 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 8.3 mg/kg food
- Assessment factor:
- 300
Additional information
Conclusion on classification
Studies of this substance are available for evaluating biodegradation, metabolism, and toxicity to aquatic vertebrate and invertebrate species.
This was not ready biodegradable when tested in accordance with OECD Guideline 301B.
This substance did not cause a significant adverse effect on the oxygen consumption of the microbes associated with the activated sludge. The EC50for inhibition of metabolism, as represented by respiration, was calculated to be 1650 mg/L.
The acute aquatic toxicity of this substance was evaluated using rainbow trout and was conducted in accordance with OECD Guideline 203. The 96 h LL (Lethal Loading Rate) 50 value of the substance was determined to be >100 mg/L. The NOEL was 100 mg/L.
Then acute toxicity of this substance was evaluated in Daphnia. The 48-Hour EL50 was determined to be 75 mg/L nominal loading rate and the No Observed Effect Loading rate was 75 mg/l nominal loading rate.
The acute toxicity of this substance was evaluated in freshwater algae in accordance with OECD Guideline 201. Exposure of Scenedesmus subspicatus to the test material gave an EL50 (72h, growth rate and biomass) values of > 1000 mg/L loading rate WAF. The No Observed Effect Loading rate was 1000 mg/L loading rate WAF.
Based on the available environmental fate and ecotoxicological data for daphnids, fish and algae,this substance is not acutely toxic to aquatic species; it is not readily biodegradable but has a measured log Kow of >2.59 (< 3.6 by read across to an analog substance EC 224-235-5). Therefore, this substance is not classifiable to the aquatic environment according to the EU CLP (Regulation (EC) No. 1272/2008).
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