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Diss Factsheets
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EC number: - | CAS number: -
- 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
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27April 2011 to 25 May 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The test was conducted according to the principles of GLP and a recognised ISO marine test guideline.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD guideline 306, 'Biodegradability in Seawater- Closed Bottle Method' (OECD 1992)
- Deviations:
- no
- GLP compliance:
- yes
Test material
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- natural water
- Details on inoculum:
- Populations of bacteria which occur naturally in seawater. The raw seawater used for this study was supplied by a submersible pump situated on Sutherland’s pier on the west side of Flotta in Scapa Flow. It is pumped continuously from a depth of two metres below low water spring tide level, before passing up 1.8 kilometres of plastic pipe to a 20,000 litre storage tank. Two smaller pumps move the water to three settlement tanks situated nine metres above floor level. The
seawater temperature varies between 6 ºC in the winter and 14 ºC in the summer. The salinity is between 34‰ and 37‰. Five to seven days before test commencement, raw seawater passes by gravity through a 45 μm filter to the ageing tank stored in darkness.
The seawater used for testing was collected on 19 April 2011, the temperature at collection was 13C the seawater had a salinity of 36% and an initial population of 1.9 x10+3 CFU's per ml.
Pre-treatment prior to testing:
Filtered through 45 μm mesh
Nutrient enriched
Sedimentation and decanting
Aged in darkness for: 8 days
Aerated for: 20 minutes
The seawater had a temperature on day zero of 20.3C and a mcicrobial count of 2.13 x10+3 - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 3.504 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- The study was undertaken with the Test material, test material + soluble reference (Sodium benzoate),oxygen consumption blank and soluble reference sodium benzoate. Test bottles were incubated at 20ºC ± 3ºC for 28 days. Dissolved oxygen readings were taken at 7 day intervals.
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 40
- Sampling time:
- 28 d
BOD5 / COD results
BOD5 / COD
- Parameter:
- COD
- Value:
- 1.484 other: mgO2/mg
- Results with reference substance:
- The soluble reference material, sodium benzoate, degraded by more than 60% in the first 14 days, indicating that the seawater used in
the test contained a satisfactory population of viable bacteria..
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: The test substance attained 44% degradation after 28 days but cannot be considered to be readily biodegradable in the marine environment under the terms and conditions of OECD Guideline No 306.
- Conclusions:
- The test substance biodegraded by 40% over 28 days and showed an inhibition of 2% to seawater bacteria.
A maximum biodegradation of 44% on day 21 of the 28 day study. - Executive summary:
The test was conducted to OECD guideline 306, 'Biodegradability in Seawater- Closed Bottle Method' (OECD 1992) and in accordance with the study plan and met all relevant validity criteria. There were no interferences in this test.
The test substance was degraded by 40% after 28 days based on COD and measurements to account for O2 consumption.
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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