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EC number: 610-555-6 | CAS number: 50650-75-4
- 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
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption
- Remarks:
- adsorption
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 1996-07-17 to 1996-07-19
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Procedure of the OECD 302B Guideline was applied, reporting is limited but results are plausible
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1996
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD 302B Sorption to sludge after 3h
- Principles of method if other than guideline:
- The Zahn-Wellens / EMPA Test according OECD Guideline 302B is a test to determine the Inherent biodegradability of test chemicals. Due to the high sludge to substance ratio sorption to the sewage sludge (inoculum) may be an important route of substance elimination in the test system which is unrelated to biodegradation. Therefore the Guideline requires a DOC estimation after 3h to check if sorption is relevant. Based on this requirement the Zahn-Wellens test design allows to check potential sorption to sewage sludge.
- GLP compliance:
- no
- Type of method:
- other: following OECD 302B
- Media:
- sewage sludge
Test material
- Reference substance name:
- 4-methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one
- EC Number:
- 610-555-6
- Cas Number:
- 50650-75-4
- Molecular formula:
- C14H22O2
- IUPAC Name:
- 4-methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one
- Test material form:
- other: test substance was dissolved in water and added to the sewage sludge
- Details on test material:
- Lot N 205 from 1996-02-20 was used as test substance
Constituent 1
- Radiolabelling:
- no
Study design
- Test temperature:
- 22 deg Celcisus
Batch equilibrium or other method
- Analytical monitoring:
- yes
- Details on sampling:
- after 3,5h the sludge suspension was filtrated an the filtrate analyzed
- Details on test conditions:
- Two test sets with 64 mg/L (46 mg/L Carbon), measured background concentration 1,6 mg/L Carbon and 1.5 mg/L Carbon
Duration of adsorption equilibrationopen allclose all
- Sample No.:
- #1
- Duration:
- 3.5 h
- Initial conc. measured:
- 41.5 other: mg/L Carbon
- pH:
- 6.7
- Sample No.:
- #2
- Duration:
- 3.5 h
- Initial conc. measured:
- 40.5 other: mg/L Carbon
- pH:
- 6.7
Results and discussion
Adsorption coefficient
- Type:
- other: % Absorption
- Value:
- 10.9
- Temp.:
- 22 °C
- % Org. carbon:
- 37
- Remarks on result:
- other: pH 6.7
Results: Batch equilibrium or other method
Mass balance (%) at end of adsorption phaseopen allclose all
- Sample no.:
- #1
- Duration:
- 3.5 h
- % Adsorption:
- 9.8
- Sample no.:
- #2
- Duration:
- 3.5 h
- % Adsorption:
- 12
- Transformation products:
- not measured
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The test setting of a Zahn-Wellens Test according OECD Guideline 302B was used to measure the adsorption of the test item to sewage sludge after 3.5 h at 22 deg C and pH 6.7. The average sorption to sewage sludge from two test sets was 10.9%.
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