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EC number: 271-898-1 | CAS number: 68611-64-3
- 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: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2008-07-14 - 2008-08-21
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: The GLP study was conducted according to an internationally accepted guideline. All study parameters are based on the specific guideline.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Urea, reaction products with formaldehyde
- EC Number:
- 271-898-1
- EC Name:
- Urea, reaction products with formaldehyde
- Cas Number:
- 68611-64-3
- Molecular formula:
- not available
- IUPAC Name:
- Urea, reaction products with formaldehyde
- Test material form:
- other: liquid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- The inoculum contained a mixed population of microorganisms obtained from the secondary effluent of the wastewater treatment plant of Pardubice processing predominantly municipal sewage.
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 3.46 mg/L
- Based on:
- COD
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 2.9
- Sampling time:
- 3 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 12.7
- Sampling time:
- 7 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 16.3
- Sampling time:
- 14 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 21.3
- Sampling time:
- 21 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 38.3
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: not ready biodegradable
- Conclusions:
- The test substance, Weikoform (Urea, reaction products with formaldehyde), is not ready biodegradable.
- Executive summary:
The test substance, Weikoform (Urea, reaction products with formaldehyde), was tested for the ready biological degradability in Closed Bottle Test. Test performance The test was performed according to: Method C.4E - Closed Bottle Test, Directive 92/69/EEC. Published in O.J. L 383A, 1992. The results of biological degradation are related to experimentally determined COD values of test and reference substance at the beginning of the test. Owing to the limited solubility of test substance in mineral medium the dosing of dispersion into each bottle was implemented. Sodium benzoate was used as the reference substance. The dosage was carried out from the stock solution. COD of the test substance in medium at the beginning of the main test: 3.46 mg/L COD of reference substance in medium at the beginning of the main test: 3.47 mg/L. In parallel to the main test the toxicity test was performed. As the test substance contains nitrogen in the chemical composition, the oxidized nitrogen forms were determined and the correction for nitrification was carried out. The test was performed at temperature of 20±1°C with the pH values of solutions 7-8 at the beginning of the test.
A degradation of 38.3 % of the test substance, Weikoform (Urea, reaction producst with formaldehyde), was attained.
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