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Diss Factsheets
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EC number: 463-270-2 | CAS number: -
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_ecotoxicological-information.png)
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:
- 2015-09-07 - 2015-12-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The GLP-Study was performed according to an internationally accepted guideline.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Alga, Growth Inhibition Test)
- Deviations:
- yes
- Remarks:
- The temperature in the experiment was in a range of 20.8 - 23.0 °C and therefore slightly lower than stated in the study plan. Because normal growth was observed, this can be stated as uncritical.
- GLP compliance:
- yes (incl. QA statement)
Test material
- Test material form:
- semi-solid (amorphous): gel
- Remarks:
- migrated information: paste
- Details on test material:
- Purity: 99.98% UVCB substance, 0.02% Tocopherol
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
Test solutions
- Vehicle:
- yes
- Details on test solutions:
- The water-accommodated fraction (WAF) was prepared for the test. This was done by mixing the load of 100.8 mg/L with the corresponding amount of nutrient medium (demin-eralised water enriched with minerals but without algae) and shaking vigorously for 23 hours. The resulting solution was filtrated through 0.45 µm nylon filters.
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- Specification: Unicellular freshwater green alga.
Genus Desmodesmus
Species subspicatus
SAG Strain Number 86.81
Taxonomic position Chlorophyta - Chlorophyceae
Origin and Culture:
The culture of Desmodesmus subspicatus was obtained in February 2014 by MBM Sci-encebridge GmbH (Institut für Pflanzenphysiologie of Universität Göttingen). The algae are kept as stock culture on solid agar at 2 - 8 °C. From the stock culture, a permanent culture was prepared. From an aliquot of the permanent culture, the pre-culture was prepared.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 20.8 - 23.0°C
- pH:
- 7.6 - 8.2
- Details on test conditions:
- At the beginning and at the end of the test, the content of the test item in the test solutions was estimated using DOC-determination.
Because of the very low solubility in test medium, no calculation from carbon content of the test item and DOC measurement was possible. The measured DOC concentrations in the treatment were in a similar low range as the blank control.
Therefore the determination of the biological results was based on the nominal concentration. - Reference substance (positive control):
- yes
- Remarks:
- Potassium dichromate K2Cr2O7
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Results with reference substance (positive control):
- 72h ErC50 1.1 mg/L
72h EyC50 0.39 mg/L
Any other information on results incl. tables
Growth Rate, Yield
Nominal Concentration in mg/L |
Parameter |
Growth Rate (0-72h) [day-1] |
Yield (0-72h) |
Blank control |
Mean |
1.60 |
396884 |
SD |
0.06 |
61309 |
|
100 |
Mean |
1.64 |
442699 |
SD |
0.05 |
68253 |
Inhibition
Nominal concentration in mg/L |
% Inhibition |
|
Growth Rate (0-72h) |
Yield (0-72h) |
|
Blank control |
0 |
0 |
100 |
-2.28 |
-11.54 |
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The toxicity of Phytosteryl Macadamiate to aquatic algae was determined according to OECD Guideline 201 (Alga, Growth Inhibition Test). Under laboratory conditions no inhibitory effects of the test item on average specific growth rate and yield were determined. The NOEC (no observed effect concentration) after 72 hours was determined to be ≥ 100 mg/L.
- Executive summary:
One valid experiment was performed.
The study was performed using 1 concentration containing 100 mg/L nominal concentration. Incubation time (test system Desmodesmus subspicatus) was 72 hours. The cell concentration of each replicate was determined by measuring the absorption of the solutions at 440 nm every 24 hours with a spectral photometer. The cell density of the cultures was calculated based on the correlation curve between the absorption and the cell density of the cultures determined with a cell counter. Growth rate µ and the yield[1]were determined from the cell number at the respective observation times.
Inhibition of algal growth was not observed in the treatment.
At the beginning and at the end of the test, the content of the test item in the test solutions was estimated by DOC measurement. The measured DOC concentrations in the treatment were in the same low range as in the control. Therefore no calculation from carbon content of the test item and DOC measurement was possible. The determination of the results was based on the nominal concentrations which represent the nominal loadings of the test item.
The 72h-EC50s of potassium dichromate (K2Cr2O7, CAS No. 7778-50-9) were determined in a separate reference test. The values lay within the range of the laboratory.
The following results for the test item PHYTOSTERYL MACADAMIATE were determined:
Endpoint
NOEC
LOEC
EC10
EC50
Growth Rate
≥ 100 mg/L
> 100 mg/L
> 100 mg/L
> 100 mg/L
Yield
≥ 100 mg/L
> 100 mg/L
> 100 mg/L
> 100 mg/L
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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