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EC number: 915-730-3
CAS number: -
The following terrestrial tests have been performed. Below in table the
results are summarized.
NOEC28d: 100 mg/kg soil dw (nitrate formation rate)
NOEC28d: 100 mg/kg soil dw (nitrate content)
ECHA has requested three soil studies for OTNE in their final
decision (May 2015, Decision number: CCH-D-2114297145-44-01/F) and were
conducted the year after (2016) The results are presented above. The
PNEC soil is 2.7 mg/kg soil dw.
It is discussed below that the EP method presents sufficiently
conservative results in comparison with the experimental terrestrial
toxicity information. The lowest experimental EC10 value is based on the
plant tests: 27 mg/kg soil dw. The PNEC soil based on experimental
testing results in 2.7 mg/kg soil dw, using an assessment factor of 10.
Discussion on the PNEC soil EP method versus aquatic toxicity:
The PNEC soil using EP method soil results in 1.11 mg/kg soil dw. The
PNEC experimental result in 2.7 mg/kg soil dw. This shows that the PNEC
soil is similar using both methods. This shows that the EP method is
sufficiently conservative as such and an additional factor of 10 for
oral exposure for log Kow > 5 is not needed.
Discussion on PNEC soil versus PNEC sediment:
The second line of evidence results from the long-term sediment
toxicity test. The information from the long-term sediment toxicity
studies on three types of species result in the lowest NOEC of 14.9
(converted to 2% organic carbon in soil) and the resulting PNECsoil from
this set would be 1.49 mg/kg dw.
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