Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.004 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
40.7 µg/L

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:
0.184 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
18.4 µg/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:
13 µg/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

Classification relevant information for environmental hazard:

Degradation

Biodegradation: not readily biodegradable (29% within 28 d taking nitrification into account, OECD 301F) based on read-across from CAS 27445-54-1.

Hydrolysis: DT50: 4.1 min at pH 7, 2.6 at pH 4 and <<2 min at pH 9 (25 °C, EU method C.7)

Bioaccumulation

Log Kow:

N-[3-(methoxydimethylsilyl)propyl]ethylenediamine: Log Kow = 3 (QSAR)

N-[3-(trihydroxysilyl)propyl]ethylenediamine (hydrolysis product): Log Kow = -0.1 (QSAR)

 

Aquatic acute toxicity

Fish: LC50 (96 h) > 100 mg/L (nominal, OECD 203)

Aquatic invertebrates: EC50 (48 h) > 210 mg/L (nominal, OECD 202) based on read across from CAS 27445-54-1.

Algae/aquatic plant: ErC50 (72 h) = 40.71 mg/L (nominal, OECD 201) based on read across from CAS 27445-54-1.

Aquatic chronic toxicity:

Fish: no data available

Aquatic invertebrates: no data available

Algae/aquatic plant: ErC10 (72 h) = 16.88 mg/L (nominal, OECD 201) based on read across from CAS 27445-54-1.

 

Classification according to CLP

N-[3-(methoxydimethylsilyl)propyl]ethylenediamine (CAS 3068-78-8) and its silanol hydrolysis product are not considered rapidly biodegradable. Toxicity data for the target substance as well as appropriate read across data are available covering the potential acute toxicity of three trophic levels (fish, aquatic invertebrates and algae) while chronic toxicity data are available for algae. Algae was found to be the most sensitive organism with the lowest acute and chronic effect values (ErC50 (72 h) = 40.71 mg/L and ErC10 (72 h) = 16.88 mg/L). Since chronic toxicity data are available for the most sensitive species and EC10/50 are clrearly > 1 mg/L the substance is not classified and labelled concerning environmental hazards, according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).