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Diss Factsheets
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EC number: 259-715-3 | CAS number: 55589-62-3
- 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 and sediment: simulation tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: sewage treatment simulation testing
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- February 2013 to July 2013
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Continous measurements were taken over a period of 6 month
- GLP compliance:
- not specified
- Remarks:
- It is a well conducted and documented study.
- Radiolabelling:
- no
- Oxygen conditions:
- aerobic/anaerobic
- Inoculum or test system:
- sewage, predominantly domestic (adaptation not specified)
- Remarks:
- Approximately 90% of the wastewater was from municipal sources.
- Details on inoculum:
- Average operating parameters of the wastewater treatment plant:
- Mixed liquor suspended solids (MLSS): 1,756 mg/L
- Hydraulic retention time (HRT): 8.2 h
- Sludge retention time (SRT): 5.7 d
- Return activated sludge ratio: 35%
- Flow rate: 171,974 m³/d
Location: Ulu Pandan, Singapore - Initial conc.:
- 8 045 other: ng/L
- Based on:
- act. ingr.
- Remarks:
- Mean concentration in the influent
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Details on study design:
- Between February 2013 and June 2013 samples were taken from wastewater before and after treatment in the sewage treatment plant. Samples were taken from the influent and from the secondary effluent. The samples were taken as grab samples and were filled in 1 L amber glass bottles and immediately transported to the laboratory in cooling containers. The samples were stored in the lab at 4°C in the dark. Samples were prepared for measurment within 10h after sampling to avoid any degradation.
- Reference substance:
- not required
- Compartment:
- wastewater
- % Recovery:
- 100
- St. dev.:
- 12
- Remarks on result:
- other: In the publication, a mean recovery of 119.5% and a relative standard deviation of 12.0% is reported.
- Compartment:
- activated sludge
- % Recovery:
- 83.1
- St. dev.:
- 9.7
- Key result
- % Degr.:
- ca. 8
- St. dev.:
- 8.8
- Parameter:
- test mat. analysis
- Sampling time:
- 6 mo
- Remarks on result:
- other: given as "mean removal rate" during the measuring peroid (Feb-July). Total number of measurements: 6
- Other kinetic parameters:
- pseudo-first order rate constant
- Transformation products:
- no
- Details on results:
- Based on a lab experiment, the biodegradation rate constant kbio was determined to be 0.0448 and 0.0594 L/g MLSS d. Based on this, the authors conclude that Acesulfame K is persistent to biological treatment. A degradation in the sewage treatment plant takes place, if at all, only at a minor amount.
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Acesulfame K was rated as "persistent" as only a mean removal rate of 8% could be determined during the measuring period.
Reference
Description of key information
The mean removal rate of Acesulfame K in a wastewater treatment plant was determined over a period of 6 month. Samples were taken from the influent and the secondary effluent. Only a mean removal rate of 8% could be determined, indicating that the substance is persistent in the wastewater treatment plant.
Key value for chemical safety assessment
Additional information
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