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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

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