Registration Dossier
Registration Dossier
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EC number: 215-174-5 | CAS number: 1309-60-0
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
he WHO assessment (1989) on lead toxicity to aquatic plants comes to the conclusion, that there is little evidence for effects of lead on aquatic plants at concentrations below 1 to 15 mg/litre. Many studies of aquatic plants have been made in sediment-free systems. However, the addition of uncontaminated sediment reduces the toxicity of lead to aquatic plants by reducing its availability.
Studies have demonstrated that there was a significant effect on algal growth at the four highest concentrations for both average specific growth rate and cell yield, resulting in a NOEC of 22.7 µg/L dissolved lead and a LOEC of 44.3 µg/L dissolved lead for both endpoints. Effective concentrations to reduce organism growth by 10% and 20% relative to control performance are summarized in. Statistical results are also reported based upon measured concentrations from test initiation only
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 22.7 µg/L
Additional information
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