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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
supporting study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Test organisms (species):
Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum)
96 h
Dose descriptor:
Effect conc.:
0.4 mg/L
Conc. based on:
Basis for effect:
growth rate
Validity criteria fulfilled:
not specified
Executive summary:

The toxicity of chromium(III) to Selenastrum capricornatum was studied and the results calculated from initial measured concentrations. The algistatic concentration was >1000 µg/l and the concentration that caused a 50% reduction in growth was 397 µg/l.

Description of key information

Key value for chemical safety assessment

EC50 for freshwater algae:
1.4 mg/L

Additional information

Based on Cr3+ EC50 0.3 mg/l (ca 1.5 mg/l as citrate)

Classification proposed as Aquatic Chronic 3