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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.016 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.293 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.002 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.046 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:
0.083 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Ecotoxicological information Cyclohexylamine

In moist medium, N,N’,N”-tricyclohexyl-1-methylsilanetriamine (CAS 15901-40-3) hydrolyses very rapidly (half-life <2 minutes at 25°C and pH 7) to form methylsilanetriol (CAS 2445-53-6) and cyclohexylamine (CAS 108-91-8).

Ecotoxicological studies are conducted in aquatic medium or in moist environments; therefore the hydrolysis rate of the substance is particularly important since after hydrolysis occurs the resulting product has different physicochemical properties and structure. Therefore, for the purpose of establishing PNECs for the two hydrolysis products of the registered substance, the REACH data set includes additional ecotoxicological studies conducted with the hydrolysis products (or surrogate substance) of N,N’,N”-tricyclohexyl-1-methylsilanetriamine.

Aquatic data are available with cyclohexylamine (CAS 108-91-8). The data indicates that cyclohexylamine exhibits some short-term toxicity to aquatic organisms, with L(E)C50 values of 19 mg/l (unbuffered media) and >100 mg/l (buffered media) for fish, 36.3 mg/l for invertebrates (unbuffered media) and 29.3 mg/l for algae (unbuffered media), with an algal NOEC value of 10.3 mg/l (unbuffered media).

There is some uncertainty relating to the short-term Daphnia and algae studies due to the increase in pH outside of the ideal range of pH 6-9. A long-term toxicity to invertebrates NOEC value of 1.6 mg/l has also been determined. Details from the study report show that the pH rose significantly in the highest concentrations tested. However, the pH in the concentration relevant for the NOEC value (1.6 mg/l) was reported to be up to 8.1, and the pH in the next concentration up (2.9 mg/l), was reported to be up to 8.0. These pH measurements are not above the recommended values in the OECD guidance, and are not unrealistic for environmental conditions. This data is relevant for the effects of the hydrolysis product cyclohexylamine.

Cyclohexylamine is used to read-across to short-term toxicity to fish, invertebrates and algae endpoints.

Conclusion on classification