Registration Dossier
Registration Dossier
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EC number: 256-277-5 | CAS number: 46729-07-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 1 µg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.1 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 85 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.64 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.064 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:
- 0.13 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential to cause toxic effects if accumulated (in higher organisms) via the food chain
Additional information
Conclusion on classification
Three acute endpoints for three different trophic levels are available for 4 -(1,1 -dimethylethyl)cycolhexyl methacrylate. No effects were found in any of the tests up to the water slubility limit.
The substance is readily biodegradability and has a log Kow of 6.07.
Acute classification:
Acute endpoints are all > water solubility limit, therefore under Regulation (EU) No 286/2011 4 -(1,1 -dimethylethyl)cyclohexyl methacrylate is not classified acute aquatic hazardous.
Chronic classification:
The substance is readily biodegradable and the chronic ErC10 for algae is 1.03 mg/L. This is just above the cut-off value for classification and the substance does not need to be classified.
Because only one chronic endpoint is available, chronic classification is also based on acute data, but with no acute effects up to the water solubility limit and 4-(1,1-dimethylethyl)cyclohexyl methacrylate
being readily biodegradable the substance would not get chronic classification.
Proposal for classification: Not classified.
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