Registration Dossier
Registration Dossier
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EC number: 250-437-8 | CAS number: 31024-56-3
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.2 mg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 2 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.02 mg/L
- Assessment factor:
- 5 000
- 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:
- 0.767 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.077 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:
- 0.036 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
The predicted half-life of N-[3-(trimethoxysilyl) propyl]butylamineat 20-25°C is 4.0 h at pH 7. The substance will therefore undergo rapid hydrolysis in contact with water to form 3-(N-butylamino)propylsilanetriol and methanol.The silanol hydrolysis product is not readily biodegradable.
N-[3-(trimethoxysilyl) propyl]butylamine (CAS No. 31024-56-3) is not classified for the environment in the EU according to Regulation (EC) No 1272/2008 because measured data for the structurally analogous substanceN-ethyl-3-trimethoxysilyl-2-methylpropanamine (CAS No. 227085-51-0) indicate that both the parent substance and the silanol hydrolysis product are not toxic. Short term data are available and the lowest EC/LC50is > 100 mg/l.
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