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EC number: 218-900-9 | CAS number: 2277-19-2
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
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:
- April 16-June 25, 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 020
- Report date:
- 2020
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Alga, Growth Inhibition Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- (Z)-non-6-enal
- EC Number:
- 218-900-9
- EC Name:
- (Z)-non-6-enal
- Cas Number:
- 2277-19-2
- Molecular formula:
- C9H16O
- IUPAC Name:
- (Z)-non-6-enal
- Test material form:
- liquid
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
- Details on sampling:
- - Concentrations: all concentrations
Test solutions
- Vehicle:
- no
- Details on test solutions:
- PREPARATION AND APPLICATION OF TEST SOLUTION (especially for difficult test substances)
The test substance was added to brown sterile bottles and sterilized synthetic growth medium was added with a sterilized stir bar. The test solution was then stirred for 72 hrs. It was then allowed to settle for 1 hr. Since the test substance had a higher density than water, it settled to the bottom of the flask. The settled test substance in the bottom 300 mL was drawn off, and the test solution taken from the higher water layer saturated with test substance.
- Controls:
No test substance.
- Evidence of undissolved material (e.g. precipitate, surface film, etc.):
At higher concentration some precipitate may have formed.
Test organisms
- Test organisms (species):
- Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)
- Details on test organisms:
- TEST ORGANISM
- Strain: 61.81 SAG
- Source (laboratory, culture collection): SAG, Culture Collection of Algae at Pflanzenphysiologisches Institut of the University of Gottingen
- Method of cultivation: Cultures were maintained according to OECD guidelines
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 21-24 degrees C
- pH:
- 7.35-7.72
- Nominal and measured concentrations:
- Nominal: 9.53, 17.1, 30.9, 55.6, 100 mg/L active ingredient
Measured: 0.63, 1.74, 3.79, 7.64, 12.7 mg/L - Details on test conditions:
- TEST SYSTEM
- Test vessel: conical flasks
- Type (delete if not applicable): air-permeable silicon sponge caps
- Material, size, headspace, fill volume: 250 mL glass
- Initial cells density: 5000 cells/mL
- Control end cells density: 822,000 cells/mL
- No. of organisms per vessel:
- No. of vessels per concentration (replicates): 4
- No. of vessels per control (replicates): 8
GROWTH MEDIUM
- Standard medium used: yes
- Detailed composition if non-standard medium was used:
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: purified water
OTHER TEST CONDITIONS
- Sterile test conditions: yes
- Light intensity and quality: 4440-8880 Lux
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) cell concentration at 24, 48, and 72 hrs after start of exposure
- Determination of cell concentrations: electronic particle counter
TEST CONCENTRATIONS
- Spacing factor for test concentrations: 1.8
- Justification for using less concentrations than requested by guideline:
- Range finding study
- Test concentrations: 1,10, and 100 mg/L
- Results used to determine the conditions for the definitive study: - Reference substance (positive control):
- yes
- Remarks:
- 3,5-dichlorophenol was used as a positive control twice a year.
Results and discussion
Effect concentrationsopen allclose all
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 3.31 mg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- act. ingr.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 0.5 mg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- act. ingr.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- < 0.63 mg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- act. ingr.
- Basis for effect:
- growth rate
- Details on results:
- - Exponential growth in the control (for algal test): yes
- Observation of abnormalities (for algal test): Abnormalities were seen at all test concentrations of 1.74 mg/L and above.
- Unusual cell shape: Low numbers of normal cells were seen at concentrations of 1.74 mg/L and above.
- Flocculation: Cell debris was seen at all test concentrations, increasing as concentration increased. - Results with reference substance (positive control):
- - Results with reference substance valid? yes
- EC50: 2.92 mg/L - Reported statistics and error estimates:
- 95% confidence limit for EC50: 2.97-3.67 mg/L
Any other information on results incl. tables
Nominal Concetration (mg a.s./L) |
Measured Concentration (Geometric Mean, mg a.s./L) |
Growth Rate (1/day) |
% Inhibition of Growth Rate |
Yield (Cells x 104mL) |
% Inhibition |
Control |
-- |
1.695 |
-- |
81.7 |
-- |
9.53 |
0.63 |
1.416 |
+16.5 |
34.8 |
+57.4 |
17.1 |
1.74 |
1.139 |
+32.8 |
15.4 |
+81.1 |
30.9 |
3.79 |
0.801 |
+52.8 |
5.1 |
+93.7 |
55.6 |
7.64 |
0.397 |
+76.6 |
1.2 |
+98.6 |
100 |
12.7 |
0.114 |
+93.3 |
0.2 |
+99.7 |
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The 72-hr EC50 based on growth rate was 3.31 mg/L based on measured concentrations.
- Executive summary:
The toxicity of the test substance to algae was tested in an OECD Guideline 201 test. Algae were exposed to measured concentrations of 0.63, 1.74, 3.79, 7.64, and 12.7 mg/L for 72 hours. Negative controls were also performed. Four replicates were performed. The NOEC was less than 0.63 mg/L based on measured concentrations. The 72-hr EC50 based on growth rate was 3.31 mg/L based on measured concentrations.
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