1,2,3-Propanetricarboxylic acid, 2-hydroxy-, chromium(3+) salt (1:1)

Toxicity to aquatic algae and cyanobacteria

Link to relevant study record(s)

Reference

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

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)

Duration:

96 h

Dose descriptor:

EC50

Effect conc.:

0.4 mg/L

Conc. based on:

element

Remarks:

chromium

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.

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