Registration Dossier
Registration Dossier
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EC number: 245-659-7 | CAS number: 23432-62-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.1 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 1 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.01 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 0.1 mg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 32 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.397 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.04 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:
- 0.021 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
Degradation
Biodegradation: not readily biodegradable; 19-20% biodegradation within 28 days (based on RA from methyl-N-{[dimethoxy(methyl)silyl]methyl}carbamate CAS 23432-65-7)
Hydrolysis half-life: 4 h at pH 7
Bioaccumulation
Methyl-N-[3-(trimethoxysilyl)propyl]carbamate: Log Kow 0.8 (QSAR)
Methyl-N-[3-(trihydroxysilyl)propyl]carbamate: Log Kow -2.3 (QSAR)
Aquatic acute toxicity
For fish: LC50 (96 h): > 100 mg/L (Oncorhynchus mykiss)
For aquatic invertebrates: EC50 (48 h): > 100 mg/L (Daphnia magna)
For algae/aquatic plant: EC50 (72 h) =117.4 mg/L growth rate (Desmodesmus subspicatus) (based on RA from methyl-N-{[dimethoxy(methyl)silyl]methyl}carbamate CAS 23432-65-7)
Aquatic chronic toxicity
For fish: no data available on the substance.
For aquatic invertebrates: no data available on the substance.
For algae/aquatic plant: NOEC (72 h) = 33.5 mg/L growth rate (Desmodesmus subspicatus) (based on RA from methyl-N-{[dimethoxy(methyl)silyl]methyl}carbamate CAS 23432-65-7)
Classification assigned according to CLP
The substance is not readily biodegradable and has a low potential for bioaccumulation (log Kow < 3). Acute toxicity data for the substance itself and an appropriate read across substance are available for three trophic levels. All L/EC50 values are > 100 mg/L. Chronic data for algae are available and the NOEC is > 1 mg/L. Therefore, the substance is not classified for the environment according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).
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