Registration Dossier
Registration Dossier
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EC number: 203-417-8 | CAS number: 106-63-8
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 2.72 µg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.021 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.272 µg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.019 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 1.9 µg/kg sediment dw
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 2.19 µg/kg soil dw
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008
Classification related information
Biodegradability:readily biodegradable (90 - 100 % (TIC/ThIC) after 28 days)
Log Pow: 2.38 at 25 °C
Aquatic acute toxicity
- Aquatic invertebrates: EC50 (48 h) = 8.2 mg/L (measured,Daphnia magna,OECD TG 202)(n-butyl acrylate)
- Algae: ErC50 (72 h) = 5.28 mg/L (measured,Desmodesmus subspicatus, OECD 201)(isobutyl acrylate)
- Fish: LC50 (96 h) = 2.1 mg/L (measured,Pimephales promelas, OECD 203)(isobutyl acrylate)
Aquatic acute toxicity
- Algae: ErC10 (72 h) = 2.09 mg/L (measured,Desmodesmus subspicatus, OECD 201)(isobutyl acrylate)
-Aquatic invertebrates:NOEC (21 d) = 0.136 mg/L (measured,Daphnia magna, OECD 211) (n-butyl acrylate)
Conclusion
The available experimental test data are reliable and suitable for classification purposes under Regulation 1272/2008. Isobutyl acrylate was found to be readily biodegradable. The most sensitive test for the aquatic compartment was the long-term toxicity test to aquatic invertebrates (Daphnia magna). The test revealed a 21-day NOEC of 0.136 mg/L. The log Pow was determined to be 2.38. Based on these results, isobutyl acrylate is not classified for aquatic short-term (acute) toxicity, but for aquatic long-term (chronic) toxicity Category 3 (H412, Harmful to aquatic life with long-lasting effects) according to Regulation (EC) No 1272/2008 (CLP), as amended for the fifteenth time in Regulation (EU) 2020/1182.
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