Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.017 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.17 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.002 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
68.1 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.013 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.001 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.002 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
0.015 g/kg food
Assessment factor:
90

Additional information

N-(Morpholinomethyl)triethoxysilane was neither harmful to fish nor to aquatic invertebrates. The only aquatic species that was adversly affected was the freshwater green algal species Desmodesmus subspicatus (ECr50 = 25.0 mg/L). In the CSR a risk assessment is provided for terrestrical organisms based on the Equilibrium Partitioning Method. As the risk chrakterisation ratios are low for all applications of the substance no futher testing is considered to be neccessary.

Conclusion on classification

Based on the 72-hours ECr50 of 25.0 mg/L in the freshwater green algal species Desmodesmus subspicatus and the low biodegradability N-(Morpholinomethyl)triethoxysilane is classified as harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.