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EC number: 282-850-4 | CAS number: 84434-51-5
- 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)
Description of key information
No toxic effects against algae at 100mg/L were noted on the substance tested. By virtue of read across to this structural analogue, Reactive Blue 198 is also considered to have an 72h EC50 value of >100mg/L. The substance is not classified for effects on this basis.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 100 mg/L
Additional information
The influence of the test item on the growth of the green algal species Scenedesmus subspicatus CHODAT was investigated in a 72-hour static test according to the Commission Directive 92/69/EEC, Annex Part C.3, 1992, and the OECD Guideline No.
201, 1984. However, the test method was modified to quantify the algicidal effect of the test item, but also the growth inhibition effect caused by reduced light intensities in the colored test solutions.
The nominal test concentrations were 1.0, 3.2, 10, 32 and 100 mg/L and a control. All test media down to the lowest test concentration were slightly to strongly colored by the test item. In the test media the mean measured test item concentrations at the start of the test ranged from 91 to 104% of the nominal values. This shows the right dosage of the test item. During the test period of 72 hours a decrease of test item concentration in the lower test media was determined. At the end of the test 45 - 90% of the nominal values were found. The losses could be due to adsorption of the test item, particularly in the low-level samples. The total mean measured test concentrations (calculated as the average over all measurements per test concentration) in the test concentrations of nominal 100 to 3.2 mg/L varied in the range of 80 to 97% of the nominal values. Therefore, the reported biological results are related to the nominal test item concentrations. .
The total mean measured test concentration of the lowest test medium concentration of 1.0 mg/L was 68% of nominal. However, this result was not taken into account, since this concentration was below the highest concentration without significant inhibitory effects on
the growth of the alge in experimental part A. The same growth inhibition of Scenedesmus subspicatus was observed when the algae
grew in test water without test item, but under reduced light intensities by the filter effect of the colored test media as in the second parallel experimental part, where the algae grew in the test media with dissolved test item.
Thus, in conclusion, this modified algal test has clearly demonstrated that the observed growth inhibition effect of the test item on Scenedesmus subspicatus was caused only due to an indirect effect, the light filter effect in the colored test solutions. Thus, a toxic
effect of the test item on the algal cells can be excluded up to the highest test concentration of nominal 100 mg/L.
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