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EC number: 222-477-6
CAS number: 3486-35-9
For microbial assays, in total 108 individual high quality NOEC/EC10s represent 4 nitrogen transformation processes, 5 carbon transformation processes and 8 enzymatic processes and range from 17 mg Zn/kg dw for respiration to 2623 mg Zn/kg dw for phosphatase.
For microbial assays, in total 108 individual high quality
NOEC/EC10s are selected for the PNEC derivation. These values represent
4 nitrogen transformation processes, 5 carbon transformation processes
and 8 enzymatic processes and range from 17 mg Zn/kg dw for respiration
(Chang and Broadbent, 1981 and Lighthart et al., 1983) to 2623 mg Zn/kg
dw for phosphatase (Doelman and Haanstra, 1989).
Information on the background Zn concentration, allowing
correction for differences in bioavailability among soils, is only
available for 76 NOEC or EC10 values, representing 13 microbial
processes (4 for N cycle, 5 for C cycle and 4 enzymatic processes). The
total range in NOEC/EC10 values for the dataset with results for
background Zn concentration is the same as for the total dataset for
All toxicity data are expressed as added Zn concentration in soil,
based on either the nominal dose added or on measured, background
corrected soil Zn concentrations.
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