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Diss Factsheets
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EC number: 247-888-8 | CAS number: 26657-97-6
- 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
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:
- 18 Aug - 15 Sep 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP - Guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- Sorbitan, octanoate (2:3)
- EC Number:
- 295-118-4
- EC Name:
- Sorbitan, octanoate (2:3)
- Cas Number:
- 91844-53-0
- IUPAC Name:
- 91844-53-0
- Details on test material:
- - Name of test material (as cited in study report): sorbitansesquioctanoate
- Physical state: liquid
- Analytical purity: 99%
- Lot/batch No.: ES 65631498
- Durability: 36 months
- Storage condition of test material: 20 °C
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- mixture of sewage, soil and natural water
- Details on inoculum:
- - Source of inoculum/activated sludge: Fresh samples from a lake, the effluent of a municipal sewage treatment plant and an extract of surface soil were mixed and cultivated in a laboratory sewage treatment. By aeration air germs were added. The sludge was used as inoculum until after at least one month's operation, but not after more than four months. Thereafter samples from the above mentioned sites were collected again, mixed with an aliquot of the old sludge and cultivated as described.
- Laboratory sewage treatment: Effluents were clear, temperature was kept between 20 and 25 °C, sludge settled well and aeration kept the mixture aerobic at all times
- Preparation of inoculum for exposure: A fresh sample from the Laboratory model activated sludge plant containing approximately 1.875 g suspended solids was collected and filtered by means of a water jet pump through a filter paper (Schleicher & Schüll, black ribbon 589(1)). The sludge was washed twice with mineral medium. Afterwards, it was suspended in 250 mL mineral medium an stirred until it was homogeneous. 4 mL of this solution were used to inoculate 1 litre of mineral medium.
- Concentration of sludge: 30 mg/L suspended solids - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: according to guideline
- Test temperature: 22 ± 1 °C
- pH: 7.47 - 7.59
- Suspended solids concentration: 30 mg/L
TEST SYSTEM
- Culturing apparatus: incubation device Sensomat system (Digital Respirometer System, Liebherr, Aqualytic, Langen, Germany)
- Number of culture flasks/concentration: 3
- Measuring equipment: The produced CO2 was trapped in potassium hydroxide. The pressure decrease was detected by the Sensomat.
SAMPLING
Oxygen consumption was measured 360 times and automatically recorded by the Sensomat.
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes, 3 replicates
- Abiotic sterile control: yes, 2 replicates
- Toxicity control: yes, 2 replicates
- Reference substance: yes, 2 replicates
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 89
- St. dev.:
- 1
- Sampling time:
- 28 d
- Details on results:
- - 72% degradation occurred within the 10-day window. Therefore, the test substance can be regarded as readily biodegradable.
- The test substance is not assumed to be inhibitory, because 72% degradation (based on total ThOD or COD, respectively) occurred within 14 days in the toxicity controls.
- The degradation of the abiotic sterile controls was 5% after 28d. The result of the second vessel was considered to be an outlier and was therefore not taken into account.
- The mean oxygen uptake of the 3 inoculum blank controls was 57.7 mg/L after 28 d.
BOD5 / COD results
- Results with reference substance:
- - The reference substance sodium benzoate was biodegraded to an average of 93% within 14 days
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
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