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EC number: 926-195-0 | CAS number: 1176284-65-3
- 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:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 17 August 2015 to 25 September 2015
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Freshwater Alga and Cyanobacteria, Growth Inhibition Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.3 (Algal Inhibition test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- The test substance is listed as ZWA 5496/100. The test substance, a brown liquid, is the reaction product of maleic anhydride, disproportioned tall oil fatty acid, linseed oil and methanol. The test substance was obtained from Allnex Belgium and was stored at room temperature (20 ± 5°C) and kept away from light
- Analytical monitoring:
- yes
- Vehicle:
- no
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- The culture test species of Desmodosesmus subspicatus was obtained in February 2014 by MBM sciencebridge GmbH (Institut für Pflanzenphysiologie of Universität Göttingen). The algae are kept as stock culture on solid agar at 2 to 8 °C. From the stock culture, a permanent culture was prepared. From an aliquot of the permanent culture, the pre-culture was prepared.
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 72 h
- Hardness:
- No infomration provided.
- Test temperature:
- The temperature of the test medium was 20.8°C to 23.7 °C (first experiment) and 20.8°C to 23.0 °C (second experiment) and complied with the requirements of the protocol (21 to 24°C, constant within 2°C).
- pH:
- The pH during the test measured between 7.4 and 8.6 (first experiment) and between 7.5 and 8.7 (second experiment) and complied with the requirements of the protocol (not varying by more than 1.5 unit).
- Dissolved oxygen:
- No information provided.
- Salinity:
- No information provided.
- Conductivity:
- No information provided.
- Nominal and measured concentrations:
- Two valid experiments were performed; the test solution was prepared using the water-accomodated fraction. The first experimental test was performed using 5 nominal concentrations ranging from 10 to 100 mg/L ZWA 5496/100. Because significant inhibition of algal growth was observed in the lowest concentration, a second experiment was performed using 5 nominal concentrations ranging from 1 to 100 mg/L ZWA 5496/100.
- Details on test conditions:
- The cell concentrations of each replicate was determine 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 and biomass yield were determined from the cel number at the respective observation times.
- Reference substance (positive control):
- yes
- Remarks:
- Potassium dichromate K2Cr2O7 (CAS No. 7778-50-9) was used as a positive control in the reference study.
- Key result
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 10 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Key result
- Duration:
- 72 h
- Dose descriptor:
- LOEC
- Effect conc.:
- 32 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC10
- Effect conc.:
- 11 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Key result
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 1 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Key result
- Duration:
- 72 h
- Dose descriptor:
- LOEC
- Effect conc.:
- 3.2 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC10
- Effect conc.:
- 3.4 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 25 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Results with reference substance (positive control):
- The 72h-EC50s of potassium dichromate were determined. The data exhibited sufficient statistical correspondence with the dose-response equation. The 72-h ErC%0 was reported as 1.1 mg/L; the 72-h EyC50) was reported as 0.39 mg/L.
- Validity criteria fulfilled:
- yes
- Remarks:
- pH range 7.4 to 8.6 (first test) and range 7.5 to 8.7 (second test) (protocol limits not varying by more than 1.5 unit); 20.8°C to 23.7 °C (first test) and 20.8°C to 23.0 °C (second test) (protocol requires 21 to 24°C, constant within 2°C).
- Conclusions:
- The test substance did cause a reduction of growth in a series of algal cultures (test units) exposed to the test item for 72 h. The 72 h NOEC was 10 mg/L and the LOEC was 32 mg/L for growth rate based on nominal concentrations. The 72 h ErC10 for growth rate was 11 mg/L and the ErC50 was >100 mg/L based on nominal concentrations.
Reference
Description of key information
The key study was a static algal growth inhibition test on the effects of the substance on the freshwater alga, Desmodesmus subspicatus. The 72-h growth rate NOEC was 10 mg/L (based on the water-accommodated fraction); the 72-h growth rate LOEC was 32 mg/L (based on the water-accommodated fraction); the 72-h EC10 was 11 mg/L (based on the water-accommodated fraction); and the 72-h EC50 growth rate was >100 mg/L (based on the water-accommodated fraction).
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 11 mg/L
Additional information
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.
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