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EC number: 235-252-2
CAS number: 12141-20-7
Because of the availability of multiple toxicity data for various
species and processes, the statistical extrapolation method is used to
derive the PNEC value for terrestrial organisms. The species sensitivity
distribution is based on 105 NOEC and EC10 values covering 14 different
plant species, 5 invertebrate species and 5 microbial functional
processes. The NOEC and EC10 values of the 3 groups (higher plants,
invertebrates and microbial processes) overlap in the frequency
distribution, suggesting that the sensitivity range of these organisms
All toxicity data were corrected for differences in toxicity between
laboratory and field conditions. When available, good quality toxicity
data derived in leached and aged soils are preferred. Only when no
reliable data are available for corresponding leached and aged soils,
toxicity data for leached or freshly spiked soils are also included.
This datasets consists of 14 individual high quality bounded EC10 or
NOEC values derived in aged soils, 35 results from spiked and leached
soils and 56 results from freshly spiked soils. Data from leached soils
without ageing were corrected with an additional ageing factor of 2.0,
while data from freshly spiked soils without leaching or ageing
treatments were corrected with a generic leaching/ageing factor of 4.0.
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