Registration Dossier
Registration Dossier
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EC number: 235-527-7 | CAS number: 12262-58-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.011 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.017 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 1.06 µg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.05 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.085 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.009 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:
- 0.011 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Cyclohexanone, peroxide has a harmonized classification (Index no. 617 -010 -00 -1 and 617 -010 -01 -9). Cyclohexanone, peroxide does not have a harmonized classificication for environment (neither acute nor chronic).
Three acute endpoints for three different trophic levels are available. The lowest ErC50 is found for algae and is 1.7 mg/L. Two chronic endpoints for invertebrates and algae are available. Both are the same; the 72h-ErC10 for algae is 0.53 mg/L and the 21d-NOEC for Daphnia is also 0.53 mg/L.
The substance is readily biodegradability and has a low log Kow of 1.2.
Acute endpoints are all > 1 mg/L, therefore under Regulation (EU) No 286/2011 (2nd ATP to CLP) cyclohexanone, peroxide is not classified acute aquatic hazardous.
The substance is readily biodegradable and the chronic endpoints are between 0.1 and 1.0 mg/L. This would lead to Category chronic 3.
Because only two chronic endpoints are available, chronic classification is also based on acute data: with an ErC50 of 1.7 mg/L and cyclohexanone, peroxide being readily biodegradable and a low log Kow (log Kow < 4) the substance would not get chronic classification.
Proposal for classification: Category chronic 3
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