Registration Dossier
Registration Dossier
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EC number: 207-668-4 | CAS number: 488-10-8
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.038 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.38 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.004 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 0.038 mg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.26 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.13 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:
- 0.23 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
Environmental fate and pathways
Degradation
Readily biodegradable (68% in 28 d, OECD 301 F)
Bioaccumulation
log Kow = 2.8 (pH 7, OECD 117)
Aquatic short-term toxicity
Fish
LC50 (96 g) = 54.0 mg/L (nominal, OECD 203, C. carpio)
Aquatic invertebrates
EC50 (48 h) = 45.0 mg/L (geometric mean measured, OECD 202, D. magna)
Aquatic algae
ErC50 (72 h) = 38.0 mg/L (nominal, OECD 201, P. subcapitata)
Aquatic long-term toxicity
Aquatic algae
ErC10 (72 h) = 18.0 mg/L (nominal, OECD 201, P. subcapitata)
Classification according to CLP
(Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone (CAS 488-10-8) is readily biodegradable and is not significantly bioaccumulative (log Kow < 3.0, REACh/4.0, GHS). The lowest available effect concentrations for short-term and long-term toxicity were obtained for aquatic algae, with an ErC50 (72 h) of 38.0 mg/L and an ErC10 (72 h) of 18.0 mg/L (nominal, OECD 201, P. subcapitata), respectively. Based on the available data compiled above, (Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone (CAS 488-10-8) is not classified and labelled for environmental hazards, according to the consolidated version of Regulation (EC) No 1272/2008 (dated: 01.01.2017) and further amendments (ATPs).
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