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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Remarks:
growth inhibition test
Type of information:
experimental study
Adequacy of study:
other information
Study period:
December 2007.
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
OECD 201
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
not specified
Test organisms (species):
Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum)
Duration:
72 h
Dose descriptor:
EC50
Remarks:
yield
Effect conc.:
56 mg/L
Duration:
72 h
Dose descriptor:
NOEC
Remarks:
yield
Effect conc.:
32 mg/L
Duration:
72 h
Dose descriptor:
LOEC
Remarks:
yield
Effect conc.:
56 mg/L
Duration:
72 h
Dose descriptor:
NOEC
Remarks:
growth rate
Effect conc.:
32 mg/L
Duration:
72 h
Dose descriptor:
LOEC
Remarks:
growth rate
Effect conc.:
56 mg/L
Duration:
72 h
Dose descriptor:
EC50
Remarks:
growth rate
Effect conc.:
> 56 mg/L
Validity criteria fulfilled:
not specified
Conclusions:
The substance has a NOEC (72h) equal to 32 mg/L, for both yield and growth rate.

Description of key information

Based on the OECD 201 (growth inhibition test) on Pseudokirchinella subcapitata, the substance has a NOEC (72h) equal to 32 mg/L, for both yield and growth rate.

Key value for chemical safety assessment

EC50 for freshwater algae:
56 mg/L
EC10 or NOEC for freshwater algae:
32 mg/L

Additional information