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Diss Factsheets
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EC number: 927-870-2 | 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
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1991-06-04 to 1991-08-01
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method C.5 (Degradation: Biochemical Oxygen Demand)
- Deviations:
- not applicable
- Principles of method if other than guideline:
- adaptation of the method C5 ( 1994): modified sturm test
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- - organisms, strains: a mixture of different strains of microorganisms found in activated sludge from a municipal sewage treatment plant receiving little or no industrial effluent (form Pierre Bénite - 69310 Lyon - France)
On arrival at the laboratory, the activated sludge was aerated for 4 hours: 500 ml of the mixture were sampled and homogenised for approximately 2 minutes with magnetic stirring. It was then allowed to settle for 2 periods of 30 minutes approximately ; 1% inoculation of each test flask with the supernatant was then made the same day. - Duration of test (contact time):
- ca. 28 d
- Initial conc.:
- ca. 20 mg/L
- Based on:
- other: ThCO2
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- - temperature of the test room : from 22.5°C to 23.5°C
- test volume : 3L which was aerated at the rate of 1 to 2 bubbles per second
- containers : 5 litre carboys (clear glass). Containers were covered with a dark material
- the study was conducted in darkness
- 3 assays were involved: 1 assay with the test substance at 20 mg/L
1 assay with reference substance at the concentration of 20 mg/L
1 control assay without any test substance
- determination of CO2 production for each assay every 2 days for the first 10 days, then every 3 or 5 days until the 28th day. - Test performance:
total production of C02 in control study: 29.26 mg of C02
pH measurement:
- Control: D0=8.73 and D28=7.7
-Test substance: D0=7.99 and D28=5.71
- Reference substance: D0=8.52 and D28=7.93- Parameter:
- % degradation (CO2 evolution)
- Value:
- ca. 39.16
- Sampling time:
- 4 d
- Parameter:
- % degradation (CO2 evolution)
- Value:
- ca. 97.38
- Sampling time:
- 28 d
- Details on results:
- % ThCO2 (biodegradation) of the test product at 20 mg/L:
D2 = 4.95
D4 = 30.96
D6 = 55.94
D8 = 67.53
D10 = 77.77
D15 = 97.38
D20 = 97.72
D25 = 97.72
D28 = 97.72 - Results with reference substance:
- % biodegradation of the reference substance (sodium acetate 290 mg/L): 84.4% in 28 days
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- A biodegradability of the test substance (20 mg/L) of 97.38% in 28 days was obtained under the experimental conditions.
- Executive summary:
A modified Sturm test protocol was performed to evaluation the readily biodegradability of the test substance.
The test substance was tested at 20 mg/L. Sodium acetate at 20 mg/L was used as reference product. A control assay, without test substance, was performed in the same conditions.
The degradation of the test substance was evaluated by comparing the quantity of CO2 generated in the test medium with that in the control assay in relation to the total CO2 that the substance could have theoretically produced (based on the content of the test substance).
The quality criteria for the study, notified in the E.E.C protocol and relative to the biodegradation of these test substance and to the total production of CO2 in the control assay, were respected.
Taking into account the results obtained under the experimental conditions employed the evaluation of the biotic degradation of the test substance using the Modified Sturm test showed:
a biodegradability of the test substance of 97.38% in 28 days at 20 mg/l with respect of the 10 day window.
The CO2 released and incorporated as BaCO3 was measured every 2 days over a 10 day period and then every 2 days over a 10 day period and then 3, 5 days until the 28th day.
Reference
Description of key information
A biodegradability of the test substance (20 mg/L) of 97.38% in 28 days was obtained according to Modified Sturm Test (E.E.C: 84/449 - Annex V Method C5 (1984)).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
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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