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EC number: 701-227-4 | CAS number: -
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
For assessing the aquatic hazard of CdZnS, reference has been made to ecotoxicity data obtained by standard testing on CdTe, a sparingly soluble Cd-compound. Transformation dissolution data demonstrate that the solubility of Cd in CdZnS is even much lower than the solubility of Cd from CdTe (>16-50 times lower solubility of Cd in CdZnS, as compared to solubility in CdTe). The ecotoxicity of CdTe was therefore used as a worst case for the ecotoxicity of CdZnS.
No acute effects were seen up to a concentration of 2.1 g CdTe/kg DW or 1 g Cd/kg DW.
As Cd2+ ion determines ecotoxicity, the PNEC deriviation will be based on the Cd 2+ ion as determined in the RA (2008).
Key value for chemical safety assessment
- Long-term EC10 or NOEC for soil microorganisms:
- 2 100 mg/kg soil dw
Additional information
Statistical analysis showed there was no significant difference (p>0.05) between any treatment rate of Cd/kg dry soil and the control treatment for soil carbon transformations at day 28. So, no effects were seen up to a concentration of 2.1 g CdTe/kg DW or 1 g Cd/kg DW. As Cd2+ ion determines ecotoxicity, the PNEC deriviation will be based on the Cd 2+ ion as determined in the RA (2008).
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