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Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
Translated from Japanese

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
not specified
Remarks:
Study translated from Japanese

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
444-240-8
EC Name:
-
Cas Number:
302933-83-1
Molecular formula:
C55-n H95.5-2n N7 013 Na1.5 (n-0-6) molecular weight: 1097-l4n (n=0-6)
IUPAC Name:
Sodium surfactin
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
Lot SF-S02

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
no
Details on test solutions:
A test soution of 500 mg of test substance in 50mL culture medium was prepared. Serial dilutions were used for the testing concentrations.

Test organisms

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

Study design

Test type:
static
Water media type:
freshwater
Total exposure duration:
72 h

Test conditions

Test temperature:
23.5°C
pH:
8; 5.5; 8.7

Results and discussion

Effect concentrations
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
ca. 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The EC50 (growth inhibition) 72h for algae was >100 mg/L
Executive summary:

The growth inhibition of algae exposed for 72 hours to concentrations of 0.01, 0.1, 1, 10 and 100 mg/L of the test substance was measured. The 50% effective concentration (EC50, 72h) was estimated at more than 100 mg/L.