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Diss Factsheets
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EC number: 224-583-8 | CAS number: 4419-11-8
- 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
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21.06.18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))
- Version / remarks:
- 22.01.2001
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC estimation method
- Details on study design: HPLC method:
- EQUIPMENT
- Apparatus: HPLC
- Type:
- Type, material and dimension of analytical (guard) column: Reprosil PurCN 125*4.6 mm, with pre-column Phenomenex Securi-tyGuard CN, 4x3 mm
- Detection system: Dionex, DAD-3000
MOBILE PHASES
- Type: isocratic methanol/water 55/45 (% v/v), degassed
- Experiments with additives carried out on separate columns: yes / no
- pH: 7
- Solutes for dissolving test and reference substances: -
DETERMINATION OF DEAD TIME
- Method: by inert substances which are not retained by the column (Sodium nitrate)
REFERENCE SUBSTANCES
- Identity: Phenol, Methylbenzoate, Naphthalene, 1,2,3-Trichlorobenzene, Phenanthrene, 4,4'-DDT
DETERMINATION OF RETENTION TIMES
- Quantity of test substance introduced in the column: 10 µg
- Quantity of reference substances: 10 µg
- Intervals of calibration:
REPETITIONS
- Number of determinations: 3 (test item)/ 6 (reference substances)
EVALUATION
- Calculation of capacity factors k': log k’ = 0.1938 * logKOC – 0.0129
- Calculation of retention times:
- Determination of the log Koc value: log KOC = (log k’ + 0.0129) / 0.1938 - Key result
- Type:
- log Koc
- Value:
- 3.108
- pH:
- 7
- Temp.:
- 25 °C
- Details on results (HPLC method):
- - Retention times of reference substances used for calibration:
- Details of fitted regression line (log k' vs. log Koc): log k’ = 0.1938 * logKOC – 0.0129
- Average retention data for test substance: 4.659 min - Validity criteria fulfilled:
- yes
- Conclusions:
- Variations in the retention times of reference items and test item are very small. Therefore, a stable con-figuration of the HPLC-column can be assumed.
The correlation log k’/log KOC is sufficiently accurate. As calibration gave a coefficient of determination r2 = 0.999.
As peak 2 showed a relative area < 5 %, it was considered as minor peak and only Peak 1 was used for evaluation of the log KOC of the test item.
No observations were made, which might give doubts concerning the validity of the study outcome. - Executive summary:
The study was performed using a HPLC with a cyanopropyl chemical bound resin on a silica base column. Six reference items with different retention times were used to produce a calibration curve, since retention time on cyanopropyl columns and KOC are correlated. The reference items were chosen on behalf of the retention time of the test item 2,2'-Azobis(2,4-dimethylvaleronitrile) on the column/ on the results of the pre-test.
A solvent blank followed by three injections of a solution of the reference items were analysed with HPLC, then three injections of a solution of the test item; and finally three injections of the solution with the reference items, in total ten runs.
For each reference item, the capacity factor k’ was calculated from the retention time of sodium nitrate and the retention time of the respective reference item. A calibration function was set up using the literature values for KOC of the reference items and the mean capacity factor of the six determinations. In the graph log k’ versus log KOC, linear regression was performed, giving r2 = 0.999.
The chromatogram of the test item gave two peaks. With the help of the calibration function log K versus log KOC, the corresponding log KOC values were determined as:
Peak Mean retention time [min] Log KOC + sd
1* 4.659 3.108 + 0.003
2 5.012 3.312 + 0.004
* (major peak, used for evaluation)
These values are the mean ± standard deviation of three independent determinations
Reference
Description of key information
The key value is determined in a HPLC screening study. The value indicates a low mobility of the test substance in soil.
Key value for chemical safety assessment
- Koc at 20 °C:
- 1 282
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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