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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1996
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
Considering the structural similarities of both molecules and the probability to act via a common mode of action, it is acceptable to utilise EC 202-429-0 as a read-across source. See attached document for full justification.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2011
Report Date:
2011

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Deviations:
not specified
GLP compliance:
not specified
Remarks:
Study conducted in 1996. Endpoint from collected of data and compliance details are not available.

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
Not specified.

Test solutions

Vehicle:
not specified

Test organisms

Test organisms (species):
Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum)
Details on test organisms:
Selenastrum capricornutum

Study design

Test type:
static
Water media type:
not specified
Total exposure duration:
96 h

Test conditions

Hardness:
Not Specified
Test temperature:
Not Specified
pH:
Not Specified
Dissolved oxygen:
Not Specified
Salinity:
Not Specified
Conductivity:
Not Specified
Nominal and measured concentrations:
Not Specified
Details on test conditions:
Not Specified
Reference substance (positive control):
not specified

Results and discussion

Effect concentrations
Key result
Duration:
96 h
Dose descriptor:
other: EbC50
Effect conc.:
30.7 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Details on results:
EbC50 was 30.7 mg/l (effective) after 96 hours, in a test carried out according to the OECD TG 201
towards Selenastrum capricornutum. For the endpoint growth rate an ErC50 of 110.9 mg/l was
obtained. Concentrations were measured via HPLC (CERI, 1996c).

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
EbC50 was 30.7 mg/l (effective) after 96 hours, in a test carried out according to the OECD TG 201 towards Selenastrum capricornutum. For the endpoint growth rate an ErC50 of 110.9 mg/l was obtained. Concentrations were measured via HPLC (CERI, 1996c).
Executive summary:

EbC50 was 30.7 mg/l (effective) after 96 hours, in a test carried out according to the OECD TG 201 towards Selenastrum capricornutum. For the endpoint growth rate an ErC50 of 110.9 mg/l was obtained. Concentrations were measured via HPLC (CERI, 1996c).