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EC number: 701-227-4 | CAS number: -
Toxicity to terrestrial plants
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.
Three plant ecotoxicity studies were performed with CdTe. 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 for the terrestrial compartement will be based on the Cd 2+ ion as determined in the RA (2008).
Key value for chemical safety assessment
- Long-term EC10, LC10 or NOEC for terrestrial plants:
- 2 100 mg/kg soil dw
Additional information
Three limit tests according to the OECD protocol no 208 were performed using Phaseolus vulgaris, Lepidium sativum and Secale cereale as test species. A control and a concentration of 2.1 g CdTe/kg DW or 1 g Cd/kg DW were tested. No effects were seen at this concentration for the three plant species.
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