Registration Dossier

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).