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EC number: 267-021-7 | CAS number: 67762-52-1
- 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
Link to relevant study record(s)
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 13 Jun - 16 Jul 1999
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study with acceptable restrictions: No analytical purity is given.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Alga, Growth Inhibition Test)
- Version / remarks:
- (1984)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.3 (Algal Inhibition test)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The Department of Health of the Government of the United Kingdom (date of inspection 23 Mar 1998)
- Analytical monitoring:
- yes
- Details on sampling:
- - Concentrations: control - 100 mg/L
- Sampling method: Water samples were taken (replicates R1-R3 and R4-R6 pooled) at 0 and 72 h for quantitative analysis.
- Sample storage conditions before analysis: Duplicate samples were taken at 0 h and stored frozen (approx. -20 °C) for further analysis if necessary. - Vehicle:
- no
- Details on test solutions:
- PREPARATION AND APPLICATION OF TEST SOLUTION
- Method: An amount of test material (2000 mg) was added to the culture medium and stirred for 23 h to give the 100 mg/L loading rate. The stirring was stopped after 23 h and the mixture allowed to stand for 1 h. The water accommodated fraction (WAF) was then removed by filtration through 0.45 µm filters to give the 100 mg/L loading rate WAF. An aliquot (2 L) of the 100 mg/L loading rate WAF was mixed with algal suspension (20 mL).
- Controls: The control group was maintained under identical conditions but not exposed to the test material. - Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- TEST ORGANISM
- Common name: green algae
- Strain: CCAP 276/20
- Source: Culture Centre for Algae and Protozoa (CCAP), Institute of Freshwater Ecology, Ferry House, Ambleside, Cumbria
- Method of cultivation: Cultures were maintained in the laboratory by a periodic replenishment of culture medium at a temperature of 21 ± 1 °C under continuous illumination (approx. 7000 lux) and constant aeration. - Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
- Test temperature:
- 24 ± 1 °C
- pH:
- Control: 7.5 (0 h), 8.9 - 9.0 (72 h)
100 mg/L: 7.4 (0 h), 9.4 - 9.7 (72 h) - Nominal and measured concentrations:
- Nominal: 100 mg/L loading rate WAF
Measured: < 0.18 mg/L (limit of quantification) - Details on test conditions:
- TEST SYSTEM
- Test vessel: conical flasks
- Type: covered with aluminium foil
- Material: glass, Size: 250 mL, Fill volume: 100 mL
- Aeration: constantly shaken at 100 rpm for 72 h
- Initial cells density: 10^4 cells/mL
- Control end cells density: 9.18E+5 cells/mL
- No. of vessels per concentration: 6
- No. of vessels per control: 3
GROWTH MEDIUM
- Standard medium used: yes according to OECD guideline
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: revese osmosis purified deionised water (Elga Optima 15+), pH adjusted to 7.5 ± 0.1
OTHER TEST CONDITIONS
- Photoperiod: continuous illumination
- Light intensity and quality: approx. 7000 lux
EFFECT PARAMETERS MEASURED
- Determination of cell concentrations: Samples were taken at 0, 24, 48 and 72 h and the cell densities determined by using a haemocytometer and light microscope.
TEST CONCENTRATIONS
- Range finding study
- Test concentrations: 100 mg/L
- Results used to determine the conditions for the definitive study: The results showed no effect on growth at the 100 mg/L loading rate WAF. - Reference substance (positive control):
- no
- Duration:
- 72 h
- Dose descriptor:
- EL50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Remarks:
- (WAF)
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOELR
- Effect conc.:
- >= 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Remarks:
- (WAF)
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EL50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Remarks:
- (WAF)
- Basis for effect:
- biomass
- Details on results:
- - Exponential growth in the control: yes
- Any stimulation of growth found in any treatment: yes, 4% stimulation of growth after 72 h (100 mg/L)
- Effect concentrations exceeding solubility of substance in test medium: The effect concentrations exceeded the water solubility of the test substance. - Reported statistics and error estimates:
- A Students t-test was performed for statistical analysis.
Reference
The test exhibited an EL50 of > 100 mg/L (nominal) based on the growth rate. No effects were observed in the range of water solubility. Chemical analysis of the 100 mg/L loading rate WSFs at 0 and 72 h showed the measured test concentrations to be less than the limit of quantification of the analytical method (0.18 mg/L). Exceeding the duration of stirring did not result in significant increase in TOC in test solutions.
Table 1: Cell densities in the definitive study
Nominal loading rate [mg/L] |
Cell densities [cells/mL] |
|||
0 h |
24 h |
48 h |
72 h |
|
Control R1 |
6.65x10³ |
3.61 x105 |
6.94 x105 |
8.33 x105 |
Control R2 |
5.00 x10³ |
3.89 x105 |
5.83 x105 |
9.18 x105 |
Control R3 |
5.00 x10³ |
3.89 x105 |
5.56 x105 |
8.33 x105 |
Control Mean |
5.55 x10³ |
3.80 x105 |
6.11 x105 |
8.61 x105 |
100 R1 |
3.35 x10³ |
4.72 x105 |
5.56 x105 |
1.17 x106 |
100 R2 |
5.00 x10³ |
3.89 x105 |
5.56 x105 |
9.18 x105 |
100 R3 |
5.00 x10³ |
3.89 x105 |
5.83 x105 |
1.00 x106 |
100 R4 |
6.65 x10³ |
4.17 x105 |
5.28 x105 |
6.68 x105 |
100 R5 |
5.00 x10³ |
4.17 x105 |
6.11 x105 |
8.33 x105 |
100 R6 |
3.35 x10³ |
4.17 x105 |
5.56 x105 |
9.18 x105 |
100 Mean |
4.73 x10³ |
4.17 x105 |
5.56 x105 |
9.18 x105 |
Table 2: Inhibition of growth rate and biomass
Nominal loading rate [mg/L] |
Area under curve at 72 h |
% inhibition |
growth rate (0-72 h) |
% inhibition |
Control |
3.38x107 |
- |
0.070 |
- |
100 |
3.43x107 |
[2] |
0.073 |
[4] |
[increase in growth as compared to the controls]
Description of key information
EL50 (72 h) > 100 mg/L for Scenedesmus subspicatus (WS: < 0.05 mg/L OECD 201)
Key value for chemical safety assessment
Additional information
In accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5 a read across to the structurally similar analogue substance dipentaerythritol with fatty acids, C5 and C9iso (CAS 647028-25-9) was conductedtofulfil the data requirements according to Annex VII-IX ofcarboxylic acids, C5 -9, hexaesters with dipentaerythritol (CAS 67762-52-1)in regard to toxicity to aquatic algae. This read across is justified in detail in the overall summary (IUCLID section 6.1) and within the analogue justification in IUCLID section 13. The substance consists of the same alcohol component (dipentaerythritol) and similar fatty acid chain lengths as the target substance (C5-9 for the target substance compared to C5,9iso for the source substance).
The study with the read-across substance dipentaerythritol with fatty acids, C5 and C9iso (CAS 647028-25-9) investigated the toxicity to algae in a GLP guideline study. The test was performed according to OECD 201 (Mead and Mullee, 2000) with Scenedesmus subspicatus exposed to a water accommodated fraction with a limit concentration of 100 mg/L. The test substance concentration was analysed using GC-analysis and resulted in a concentration of < 0.18 mg/L (limit of quantification). No inhibition was observed after 72 h. Therefore, this study resulted in an EL50 of > 100 mg/L (nominal). The NOELR was derived to be 100 mg/L (nominal).
Based on the results from a structurally related read-across substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5), characterized by a similar ecotoxicological profile and structure, it can be concluded thatcarboxylic acids, C5 -9, hexaesters with dipentaerythritolwill not exhibit toxic effects to aquatic algae up to the limit of water solubility.
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