Registration Dossier
Registration Dossier
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EC number: 236-751-8 | CAS number: 13473-90-0
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The lowest endpoint based on time weighted mean measured aluminium concentrations was the EC50 for yield that was equal to 0.075 mg/L. The
lowest EC10 (considered to represent the NOEC) was also for yield and equal to 0.015 mg/L
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 0.075 mg/L
- EC10 or NOEC for freshwater algae:
- 0.015 mg/L
Additional information
From a study with Pseudokirchneriella subcapitata the lowest aluminium endpoint based on time weighted mean measured aluminium concentrations was the EC50 for yield that was equal to 0.075 mg/L. The lowest EC10 (considered to represent the NOEC) was also for yield and equal to 0.015 mg/L
Data for nitrate toxicity to algae is not available however, based on the fish and Daphnia results presented in points 6.1.1, 6.1.2, 6.1.3 and 6.1.4 it is clear that the aluminium ion is the more potent ingredient of aluminium nitrate and therefore no concern should arise for nitrate. In addition nitrate stimulates plant and algal growth in fact test medium (AAP) recommended within OECD 201 test guideline contains a concentration of 25.5 mg NaNO3/L which is above the Al endpoints reported above.
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