Registration Dossier
Registration Dossier
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EC number: 204-498-2 | CAS number: 121-79-9
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.37 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 3.7 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.037 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 0.37 µg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 6.36 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 19.55 µg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 1.955 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:
- 3.692 µg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Acute aquatic toxicity test results are used in the risk assessment since chronic data were not available. Aquatic toxicity against aquatic invertebrates, fish and algae is addressed by experimental results. The lowest short-term toxicity value is the ErC50 in Pseudokircheneriella subcapitata of 0.37 mg/L. In an activated sludge nitrification inhibition study an EC50 of 636 mg/L was determined. Therefore, the substance is considered to elicit adverse effects against aquatic/STP organisms that would identify a relevant hazard and justifies PNEC derivation for regulatory purposes.
Conclusion on classification
In acute aquatic toxicity tests, the test item revealed LC50/EC50 values below 1 mg/L, and thus needs to be classified as hazardous to the aquatic environment in accordance with Section 4.1.2.6., Annex I of Regulation 1272/2008/EC. As the test item is not considered readily biodegradable, the relevant classification is Aquatic Acute 1 (H400) and Aquatic Chronic 1 (H410).
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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