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EC number: 291-010-6 | CAS number: 90295-19-5
- 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:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- October from 24th to 27th, 1997
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Justification for type of information:
- REPORTING FORMAT FOR THE ANALOGUE APPROACH
Justification for Read Across is explained in the endpoint summary and it is further detailed in the report attached to the IUCLID section 13. - Reason / purpose for cross-reference:
- read-across source
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.3 (Algal Inhibition test)
- GLP compliance:
- no
- Analytical monitoring:
- no
- Vehicle:
- no
- Details on test solutions:
- PRE-TREATMENT
A direct weighing was prepared to produce the only test concentration (100 mg/l). Therefore the test substance was weighted into dilution water (purified millipore water) and then treated for one hour in an ultrasonic- bath. Afterwards the solution was stirred for 24 hours on a magnetic stirrer. Insoluble particles were filtered with a glass fiber filter (pore size 4-7 µm). For test item concentration and the control 1 replicate were prepared. All flasks were sealed with cotton stoppers. - Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- TEST ORGANISM
- Strain: Plant Physiology Institute of Göttingen Universitet.
- Method of cultivation: weekly transfer of root crops.
ACCLIMATION
- Culturing media and conditions: same as test. - Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
- Test temperature:
- 23 ± 2 °C
- pH:
- 10.5 (at 72 hours)
- Nominal and measured concentrations:
- 100 mg/l nominal
- Details on test conditions:
- TEST SYSTEM
- Test vessel: Erlenmeyer flasks (300 ml) with ground-glass stoppers.
- Material, size, headspace, fill volume: 10 ml.
- Initial cells density: mathematically calculated, cell density of 10000 cells / ml.
- No. of vessels per concentration: one replicate.
- No. of vessels per control: one replicate, inoculum in nutrient solution and dilution water.
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: deionized water.
OTHER TEST CONDITIONS
- Light intensity and quality: photosynthetically effective Raumbe-radiation, intensity of 120 micro-Einstein / m2 · s.
- Culuring apparatus: storage in the light cabinet with shaking (PVP).
EFFECT PARAMETERS MEASURED
- Inspection: daily inspection of the population growth of unicellular green algae over a test period of 3 days.
- Counting: Microcell Counter Sysmex F300 Digitana. - Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Details on results:
- Growth rate was recorded at 1.2 l/d in both tested and control group.
No Observed Effect Level ≥ 100 mg/l (nominal) - Conclusions:
- EC50 (72 h) > 100 mg/l (nominal)
- Executive summary:
The acute toxic potential of the test substance was tested according to the OECD guideline 201. Desmodesmus subspicatus was exposed to one nominal concentration of the test substance at 100 mg/l. The cell density was recorded at 24 hour intervals. Inhibition of the algal population was measured as reduction in growth rate (index r), relative to control cultures grown under identical conditions. No toxic effects against algae were observed at a limit test concentration of 100 mg/l: the growth rate was recorded at 1.2 l/d in both tested and control group. The No Observed Effect Level resulted equal/greater than 100 mg/l (nominal).
Conclusion
EC50 (72 h) > 100 mg/l (nominal)
Reference
Description of key information
EC50 (72 h) > 100 mg/l (nominal)
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 100 mg/L
Additional information
No studies on the toxicity to aquatic algae and cyanobacteria are available for the Basic Blue 140 (BBl140). Nevertheless, a study conducted on the structural analogue Similar Substance 01 is available.
The acute toxic potential of Similar Substance 01 was tested according to the OECD guideline 201. Desmodesmus subspicatus was exposed to one nominal concentration of the test substance at 100 mg/l. The cell density was recorded at 24 hour intervals. Inhibition of the algal population was measured as reduction in growth rate (index r), relative to control cultures grown under identical conditions. No toxic effects against algae were observed at a limit test concentration of 100 mg/l: the growth rate was recorded at 1.2 l/d in both tested and control group. The No Observed Effect Level resulted equal/greater than 100 mg/l (nominal).
BBl140 and Similar Substance 01 share the same phthalocyaninic core and, in both cases, they present a zwitterionic moiety formed by sulphonic acid, which conducts an acid function, and a tertiary amine on the sulphonaminic chain, characterized by a basic function. BBl140 presents a further sulphonaminic functionalization, of which chain ends with a tertiary amine that, based on the stechiometrical ratio reported in the analytical characterization, in most of the cases can be salified with acetic acid.
It is expected that this difference has not a significant impact on the toxicity to aquatic algae and cyanobacteria. The read across approach has been further detailed in the report attached to the IUCLID section 13.
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