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Diss Factsheets
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EC number: 470-740-0 | CAS number: 29721-79-7
- 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:
- 03 Jan to 21 Mar, 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: done under OECD method and GLP
Data source
Reference
- Reference Type:
- other: Unnamed report
- Title:
- Unnamed
- Year:
- 2 007
- Report date:
- 2007
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Version / remarks:
- of Commission Directive 92/69/EEC
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes
- Remarks:
- Directives 2004/9/EC and 2004/10/EC
Test material
- Test material form:
- liquid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- A mixed population of activated sewage sludge micro-organisms obtained on 8th Jan 2007 from the aeration stage of a sewage treatment plant at Loughborough, Leicestershire, UK. Suspended solids determined to be 2.8g/L.
- Duration of test (contact time):
- 29 d
Initial test substance concentration
- Initial conc.:
- 10 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Test temperature: 21°C
- pH: 7.3 - 7.5
- pH adjusted: yes, with HCl
TEST SYSTEM
- Culturing apparatus: 5 litre glass culture vessels each containing 3 litres of solution.
- Number of culture flasks/concentration: 2 test flasks with test substance and inoculum. 2 test flasks with standard(sodium benzoate and inoculum
- Method used to create aerobic conditions: carbon dioxide free air at 40ml/min
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes, inoculated culture medium in duplicate.
- Toxicity control: yes, test material and sodium benzoate. one vessel only.
Reference substance
- Reference substance:
- other: Sodium benzoate
Results and discussion
- Preliminary study:
- The test material did not absorb to filter matrices or to activated sewage sludge. The samples taken for DOC analysis therefore be filtered to remove the suspended solids present without the loss of any test material.
% Degradationopen allclose all
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 6
- Sampling time:
- 1 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 16
- Sampling time:
- 2 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 65
- Sampling time:
- 6 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 87
- Sampling time:
- 28 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 92
- Sampling time:
- 29 d
- Details on results:
- Points of degradation plot (test substance): 6 % degradation after 1 d 16 % degradation after 2 d 24 % degradation after 3 d 65% degradation after 6 d 71 % degradation after 8 d 79 % degradation after 10 d 72 % degradation after 14 d 78 % degradation after 16 d 84 % degradation after 20 d 88 % degradation after 22 d 88 % degradation after 24 d 87 % degradation after 27 d 87 % degradation after 28 d and 92% degredation after 29 days.
BOD5 / COD results
- Results with reference substance:
- Points of degradation plot (sodium benzoate): 20 % degradation after 1 d 43 % degradation after 2 d 41 % degradation after 3 d 42 % degradation after 6 d 54 % degradation after 8 d 61 % degradation after 10 d 63 % degradation after 14 d 66 % degradation after 16 d 81 % degradation after 20 d 84 % degradation after 22 d 84 % degradation after 24 d 82 % degradation after 27 d 88 % degradation after 28 d and 85% degredadation at 29 days.
Any other information on results incl. tables
The toxicity control obtained 89% degredation after 14 days and 97% after 28 days thereby confirming that the test material was not toxic to the sewage treatment organisms used in the test.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The test material attained 87% degradation after 28 days and therefore can be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No 301B.
- Executive summary:
The test material attained 87% degradation after 28 days and satisfies the 10 day window validation criterion, whereby 60% degredation must be obtained within 10 days of the degredation exceeding 10%. The test material can therefore be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No 301B.
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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