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Diss Factsheets
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EC number: 231-820-9 | CAS number: 7757-82-6
- 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
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Literature data
Data source
Reference
- Reference Type:
- publication
- Title:
- The relative sensitivity of diatoms, snails, and fish to twenty common constituents of industrial wastes
- Author:
- Patrick Ruth, Cairns John and Arthur Scheier
- Year:
- 1 968
- Bibliographic source:
- The Progressive Fish-Culturist. 30(3):137- 140.
Materials and methods
- Principles of method if other than guideline:
- 120 hours test, based on Patrick, 1964;Cairns, Scheier, and Hess, 1964. Essentially the diatoms were cultured in synthetic dilution water under controlled conditions. Tests were made by putting a standard inoculum of cells in each of the flasks used for the experiments and comparing the number of cells produced at the end of a 5-day growth period.
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Sodium sulphate
- EC Number:
- 231-820-9
- EC Name:
- Sodium sulphate
- Cas Number:
- 7757-82-6
- Molecular formula:
- H2O4S.2Na
- IUPAC Name:
- disodium sulfate
Constituent 1
Test organisms
- Test organisms (species):
- Nitscheria linearis
- Details on test organisms:
- TEST ORGANISM
- Group: diatom
- Habitat: widely distributed in the unpolluted soft fresh waters of the United States as well as in other parts of the world.
ACCLIMATION
- Culturing media and conditions: diatoms were cultured in synthetic dilution water under controlled conditions.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 5 d
Test conditions
- Details on test conditions:
- TEST SYSTEM
- Test vessel: 150-milliliter Erlenmeyer flasks
- Initial cells: tests were made by putting a standard inoculum of cells in each of the flasks used.
TEST MEDIUM / WATER PARAMETERS
Soft diluition water
- Ca(NO3)2 4H2O: 0.076 g/L
- Na2 SiO3 9H20: 0.177 g/L
- KCl: 0.020 g/L
- MgSO4 7H20: 0.40 g/L
- CaCO3: 0.10 g/L
- NaHCO3: 0.40 g/L
- K2HPO4: 0.004 g/L
- Ferric citrate: 0.0004 g/L
Results and discussion
Effect concentrations
- Duration:
- 120 h
- Dose descriptor:
- EC50
- Effect conc.:
- ca. 1 900 mg/L
- Nominal / measured:
- nominal
- Basis for effect:
- cell number
Applicant's summary and conclusion
- Conclusions:
- Nitscheria linearis LD50 at 120 -h = 1900 ppm
- Executive summary:
120 hours test, based on Patrick (1964) and Cairns et al. (1964) method, was conducted on Nitzschia linearis W, diatom. Essentially the diatoms were cultured in synthetic dilution water under controlled conditions. Tests were made by putting a standard inoculum of cells in each of the flasks used for the experiments and comparing the number of cells produced at the end of a 5-day growth period.
Result
Nitscheria linearis LD50 at 120 -h = 1900 ppm
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