Registration Dossier
Registration Dossier
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EC number: 235-650-6 | CAS number: 12411-64-2
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
With regard to freshwater aquatic plants an OECD-guideline study with duckweed Lemna minor generated a 7d-EC10 of 241.5 mg Mo/L. In addition, a chronic study with the marine macroalga Ceramium tenuicorne showed that the 7d-EC10 for molybdenum was 274 mg Mo/L for this marine aquatic plant.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater plants:
- 241.5 mg/L
- EC10 or NOEC for marine water plants:
- 274 mg/L
Additional information
Freshwater compartment
For the higher plant Lemna minor (duckweed) a chronic no-effect level of 241.5 mg Mo/L is taken forward for the determination of a PNEC for the aquatic freshwater compartment, using the statistical extrapolation method.
Marine compartment
A chronic test with the marine macroalga Ceramium tenuicorne resulted in a 7d-NOEC and 7D-EC10 of 641 mg Mo/L and 274 mg Mo/L, respectively. the evaluated endpoint was length-based growth rate. The value of 274 mg Mo/L is taken forward for the determination of PNEC for the marine aquatic compartment, using the statistical extrapolation method.
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