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EC number: 237-159-2
CAS number: 13674-87-8
The lowest toxicity values (corrected, where appropriate, for
standardised organic matter content of 3.4% and a conversion factor of
1.13 for transforming results from a dry weight to wet weight basis) are
as follows: Acute toxicity to earthworms 14 d LC50= 26 mg/kg dw= 23
mg/kg ww (Eisenia foetida) Chronic toxicity to57 d NOECrepro = 3.3 mg/kg
dw= 2.9 mg/kg ww earthworms (Eisenia foetida) Toxicity to plants
NOECemergence= 19 mg/kg dw= 17 mg/kg ww (Mustard, Sinapis alba) Toxicity
to soil micro-organisms 28 d NOEC≥ 128 mg/kg ww (nitrifying
micro-organisms in sandy loam soil) The availability of a data set that
includes acceptable results from three long-term tests with species from
at least three trophic levels, means that it is possible to derive a
PNECsoil from the test data by applying an assessment factor of 10 to
the lowest chronic NOEC. The resultant PNECsoil is 3.3/10 = 0.33 mg/kg
soil dry weight.
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