Registration Dossier
Registration Dossier
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EC number: 231-106-7 | CAS number: 7439-97-6
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Endpoints that are considered to be relevant in algal growth inhibition studies are biomass growth (end parameter: NOECb) and growth rate (end parameter: NOECr). Both endpoints are included in the OECD-guidelines for these species (Guideline No 201, OECD 2006; Guideline No 221, OECD 1998), but growth rate is preferred as it is an ecologically more relevant endpoint.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 20 µg/L
- EC10 or NOEC for marine water algae:
- 330 µg/L
Additional information
Overview of reliable chronic effect levels for algae in the freshwater environment.
Species |
Trophic level |
Mo-salt |
|
Effect parameter |
Value (µg Hg/L) |
Klimisch score |
Reference |
Anacystis nidulans |
Alga |
HgCl2 |
Nominal |
14d-NOECgrowth rate
|
250 |
K2 |
Lee et al, 1992 |
Scenedesmus acutus |
Alga |
HgCl2 |
Nominal |
10d-NOECgrowth rate
|
20 |
K2 |
Huismans et al, 1980 |
Overview of reliable chronic effect levels for algae in the saltwater environment.
Species |
Trophic level |
Mo-salt |
|
Effect parameter |
Value (µg Hg/L) |
Klimisch score |
Reference |
Dunaliella tertiolecta |
Alga |
HgCl2 |
Nominal |
10d-NOECgrowth |
330 |
K2 |
Portman, 1972 |
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