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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Test procedure in accordance with German national standards
Qualifier:
according to
Guideline:
other: DIN 38412 part 9
GLP compliance:
no
Analytical monitoring:
no
Vehicle:
no
Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Details on test organisms:
TEST ORGANISM
- Strain: SAG 86.81
- Method of cultivation: in OECD medium
Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
72 h
Nominal and measured concentrations:
Nominal test concentrations: control, 15.625, 31.25, 62.5, 125, 250, 500 mg/L
Details on test conditions:
TEST SYSTEM
- Test vessel:
- Material, fill volume: Erlenmeyer glass flasks, 250 ml
- Initial cells density: 10000 cells/ml
- No. of vessels per concentration (replicates, inoculated): 4
- No. of vessels per concentration (replicates, uninoculated): 2
- No. of vessels per control (replicates, inoculated): 4
- No. of vessels per control (replicates, uninoculated): 2

GROWTH MEDIUM
- Standard medium used: yes(OECD medium)

EFFECT PARAMETERS MEASURED: measured after 0 ,24 ,48, 72 hours
- Determination of cell concentrations: fluorimeter

TEST CONCENTRATIONS
- Spacing factor for test concentrations: 2
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 500 mg/L
Nominal / measured:
nominal
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
EC20
Effect conc.:
> 500 mg/L
Nominal / measured:
nominal
Basis for effect:
growth rate

Description of key information

With high probability sodium prop-2-enesulphonate is acutely not harmful to aquatic algae.

Key value for chemical safety assessment

Additional information

The acute toxicity of sodium prop-2-enesulphonate on algae was studied in a growth inhibition test with Scenedesmus subspicatus, in accordance with German national standard DIN 38412 [BASF AG, 1989]. The 72 hours E50 was > 500 mg/L sodium prop-2-enesulphonate.