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Diss Factsheets
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EC number: 942-770-9 | 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_environmental-fate-and-pathways.png)
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- other: read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Study period:
- 22.02.1999 to 25.03.1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 999
- Report date:
- 1999
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Version / remarks:
- (1992)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
- Version / remarks:
- (1992)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- RCC Ltd, Itingen (Switzerland)
Test material
- Details on test material:
- - Name of test material (as cited in study report): Eldew PS-203
- Physical state: pale yellow, oily liquid
- Analytical purity: 100%
- Purity test date: not reported
- Lot/batch No.: 808010
- Expiration date of the lot/batch: 31.03.2000
- Storage condition of test material: test material was stored at room temperature (ca. 20°C), away from direct sunlight
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Activated sludge was collected from the wastewater treatment plant ARA Ergolz II (Füllinsdorf, Switzerland) treating domestic waste.
- Preparation of inoculum for exposure: The sludge was washed by centrifugation, the supernatant liquid phase was decanted and the solid material resuspended in tap water. This procedure was repeated twice. A homogenized aliquot of the final sludge was weighed, thereafter dried and the ratio of wet to dry weight was calculated. Based on this ratio, calculated amounts of wet sludge were suspended in test water to obtain a concentration equivalent to 4 g/L dw. During holding the sludge was aerated at room temperature until use. Prior to use the sludge was diluted with test water to a concentration of 1 g/L dw. A defined volume of this diluted activated sludge was added to the test flasks to obtain a final concentration of 30 mg/L suspended solids.
- Pretreatment: no
- Concentration of sludge: 30 mg/L suspended solids - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 104 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
- Additional substrate: no
- Solubilising agent (type and concentration if used): not used
- Test temperature: 22°C
- pH: 7.5-7.6
- pH adjusted: no
- Aeration of dilution water: not reported
- Suspended solids concentration: 30 mg/L
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: Sapromat
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: The sludge was aerated at room temperature until use.
- Measuring equipment: Sapromat
- Test performed in closed vessels: yes
- Details of trap for CO2: The CO2 generated by the biodegradation process was adsorbed by soda lime
SAMPLING
- Sampling frequency: Oxygen consumption was recorded manually by taking a daily reading at least each working day
- Sample storage before analysis: no
CONTROL AND BLANK SYSTEM
- Inoculum blank: performed
- Abiotic sterile control: performed
- Toxicity control: performed
- Other: procedural control performed
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 77
- Sampling time:
- 28 d
- Details on results:
- Points of degradation plot (test substance):
1.5 % degradation after 1 d
7 % degradation after 7 d
29 % degradation after 14 d
46.5 % degradation after 21 d
77 % degradation after 28 d
The test item proved to be readily biodegradable but failing the 10-d window critrion.
The reference substance was degraded by an average of 85% after 14 d of exposure and by an average of 87% after 28 d of exposure. The degradation rate in the toxicity control containing both the test item and the reference item was determined to be 57% after 14 d. Thus, the test item had no inhibitory effect on the activated sludge.
BOD5 / COD results
BOD5 / COD
- Parameter:
- COD
- Value:
- 1.15 mg O2/g test mat.
- Results with reference substance:
- Points of degradation plot (reference substance):
8 % degradation after 1 d
78.5 % degradation after 7 d
85 % degradation after 14 d
86.5 % degradation after 21 d
87 % degradation after 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable, but failing 10-day window
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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