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EC number: 233-334-2
CAS number: 10124-43-3
Soil microbial process
tests evaluate the native soil microbial communities exposed to the
substance. From the database of cobalt toxicity to micro-organisms,
there are 28 individual high quality NOEC/EC10 values evaluating 3
functional parameters (potential nitrification rate, glucose induced
respiration and maize residue mineralization) from 10 natural soils
collected from sites in Europe and North America. When expressed as
added soil Co, these endpoints range from 5.5 mg Co/kg dw for Glucose
induced respiration (Salpeteur
et al, University of Leuven, 2007) to 4695 mg Co/kg dw for Maize
residue respiration (Salpeteur
et al, University of Leuven, 2007). Below are the accepted high quality
studies for soil microorganisms used for derivation of the HC5 and
Table X. High
quality studies for soil microorganisms used for derivation of the HC5
and soil microorganism PNEC
Added NOEC or EC 10 (mg Co/Kg dw)
Total NOEC or EC10 (mg Co/Kg dw)
Salpeteur et al, University of Leuven, 2007
Potential nitrification rate
Glucose induced respiration
Maize residue mineralization
Long-term EC10/LC10 or NOEC for soil microorganisms: 5.5 -4685 mg/kg
soil dw (added Co).
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