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EC number: 475-290-9 | CAS number: 39537-23-0
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1994-02-28 to 1994-03-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
- Version / remarks:
- adopted 17 July 1992
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Remarks:
- Supernatant of activated sludge was used.
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Activated sludge was taken from a municipal STP at Taunusstein-Bleidenstadt, Germany
- Pretreatment: Supernatant was filtered through coarse paper filter and the first 200 mL were discarded.
- Storage conditions: The supernatant was stored aerobic until use on the same day of pre-treatment. - Duration of test (contact time):
- 16 d
- Initial conc.:
- 40 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- TEST CONDITIONS
- Composition of medium: mineral nutrient solution accroding to OECD guideline
- Additional substrate: no
- Test temperature: 20.0 - 23.7 °C (mean: 22.07 °C)
- pH: 6.87 - 8.03
- pH adjusted: yes, once in both test solutions
- Continuous darkness: yes
TEST SYSTEM
- Number of culture flasks/concentration: 2 vessels
- Method used to create aerobic conditions: aeration with filtered compressed air and agitation with a magnetic stirrer
- Measuring equipment: DOC-analyzer: LiquiTOC, Foss-Heraeus
- Test performed in open system: yes
SAMPLING
- Sampling frequency: at days 0, 2, 3, 6, 9, 13 and 16
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes, 2 vessels
- Abiotic sterile control: no
- Toxicity control: no
- Positive control: yes, 2 vessels - Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 97
- Sampling time:
- 16 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 95
- Sampling time:
- 13 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 92
- Sampling time:
- 9 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 93
- Sampling time:
- 6 d
- Results with reference substance:
- Degradation rate of sodium benzoate: 99% after 13 days.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The final degradation value after a test period of 16 d was 97%. The control substance was degraded to 99% within 13 days. From the data obtained the test material can be regarded as readily biodegradable.
Reference
Description of key information
Readily biodegradable: 97% after 16 d (OECD 301 E)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
The ready biodegradability of the substance was investigated in a study conducted according to OECD guideline 301 E (GLP). Activated sludge from a municipal sewage treatment plant was used and the degradation rate was determined by measuring the removal of dissolved organic carbon (DOC) in the test medium. After an incubation period of 16 days, a degradation rate of 97% based on DOC removal was recorded. The 10-day window criterion was met. Due to the high degradation rate the study period was shortened to 16 instead of 28 d. Based on the results, the substance is considered to be readily biodegradable according to OECD criteria.
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