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:
28.4 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.039 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:
0.019 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 (OECD 310); based on read across from CAS 23779 -32 -0

Hydrolysis: half-life pH 7 = 2.8 h

 

Bioaccumulation:

[3-(trimethoxysilyl)propyl]urea: Log Kow = -0.2 (QSAR)

Silanol hydrolysis product: [3-(trihydroxysilyl)propyl]urea: Log Kow = -3.3 (QSAR)

 

Aquatic acute toxicity

Fish: LC50 (96 h) >100 mg/L (nominal, Cyprinus carpio, OECD 203); RA from CAS 116912-64-2

Aquatic invertebrates: EC50 (48 h) > 100 mg/L (nominal, Daphnia magna, OECD 202); RA from CAS 116912-64-2

Algae/aquatic plant: ErC50 (72h) > 220 mg/L (nominal, Pseudokirchneriella subcapitata, OECD 201); RA from CAS 116912-64-2

 

Aquatic chronic toxicity

Fish: no data available

Aquatic invertebrates: no data available

Algae/aquatic plant: NOErC (72 h) = 10 mg/L (nominal, Pseudokirchneriella subcapitata, OECD 201); RA from CAS 116912-64-2

 

Classification according to CLP

The substance is not considered to be readily degradable and has a low potential for bioaccumulation (log Kow < 3). Acute toxicity data are available for all three trophic levels; The L(E)C50 effect values are >100 mg/L. Therefore [3-(trimethoxysilyl)propyl]urea (CAS 23843-64-3) is not classified and labeled according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).