Registration Dossier
Registration Dossier
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EC number: 701-227-4 | CAS number: -
Short-term toxicity to aquatic invertebrates
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.
Results of 5 tests with Daphnia magna were seen as valid. The geomean LC50 of those 5 studies was 1.14 mg CdTe/L.. This value will be used for classification.
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
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 1.14 mg/L
Additional information
In total 6 experiments were done using Daphnia magna as a test species and CdTe as toxicant.
| Test | LC50 (mg CdTe/L) | reference |
| DAC 12 003 | 0.4 | Vito (2012a) |
| DAC 12 003 herhaling | >2.2 | Vito (2012b) |
| DAC 12 003 herhaling 2 | 1.11 | Vito (2012a) |
| DAC 12 003 herhaling 3 | 0.57 | Vito (2012a) |
| DAC 12 003 herhaling 4 | 1.01 | Vito (2012a) |
| DAC 12 003 herhaling 5 | 3.53 | Vito (2012a) |
The result of DAC 12 003 herhaling 4 was not used in the final deriviation of the geomean LC50. This study was performed in an algal medium and was not considered valid.
The geomean of the other 5 studies was 1.14 mg CdTe/L.
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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