Registration Dossier

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
PNEC marine water (intermittent releases):
2 mg/L

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.072 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:
0.026 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

(Chloromethyl)triethoxysilane (CAS No. 15267-95-5) is expected to hydrolyse rapidly in contact with water to (chloromethyl)silanetriol and ethanol. The silanol hydrolysis product is not readily biodegradable.

(Chloromethyl)triethoxysilane (CAS No. 15267-95-5) is not classified for the environment in the EU according to Regulation (EC) No 1272/2008 because measured data for the registered substance and structurally analogous substances triethoxy(methyl)silane (CAS No. 2031-67-6) indicate that both the parent substance and the silanol hydrolysis product are not harmful to the environment. Short term data are available and the lowest EC/LC50 is > 100 mg/l.