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Diss Factsheets
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EC number: 947-853-3 | 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
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:
- 08.07.2010 to 19.07.2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study according to EC C.19 (OECD 121)
- 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:
- (2001)
- Deviations:
- yes
- Remarks:
- In deviation from guideline, the test item solution was repeated by injection 10 days after the measurement of the reference item solutions.
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))
- Version / remarks:
- (2001)
- Principles of method if other than guideline:
- In deviation from guideline, the test item solution was repeated by injection 10 days after the measurement of the reference item solutions.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC estimation method
- Media:
- soil
- Radiolabelling:
- no
- Test temperature:
- 25°C
- Details on study design: HPLC method:
- EQUIPMENT
- Apparatus: Merck-Hitachi autosampler L-7450, Merck-Hitachi pump L-6200, Sedex ELSD detector 85 (Channel A), Jones column oven 7990
- Type: HPLC with UV/VIS detector
- Type, material and dimension of analytical (guard) column: LiChrospher 100 CN, particle size 5 µm, 250 mm x 4 mm
- Detection system: UV/VIS
MOBILE PHASES
- Type: water/methanol: 45:55 v/v
- Experiments with additives carried out on separate columns: no
- pH: 5.76
- Solutes for dissolving test and reference substances: methanol
DETERMINATION OF DEAD TIME
- Method: by means of homologous series / by inert substances which are not retained by the column: sodium nitrate solution was used for the determination of the dead time of the HPLC system
REFERENCE SUBSTANCES
- Identity: acetanilide, isoproturon, linuron, pyrazophos, dicyclofop-methyl, and 2,4-DDT
DETERMINATION OF RETENTION TIMES
- Quantity of test substance introduced in the column: 0.4 µg/µL
- Quantity of reference substances: acetanilide: 0.1134 µg/µL , isoproturon: 0.123 µg/µL , linuron: 0.0984 µg/µL, pyrazophos: 0.1044 µg/µL, dicyclofop-methyl: 0.1019 µg/µL, and 2,4-DDT: 0.0949 µg/µL
- Intervals of calibration: not reported
REPETITIONS
- Number of determinations: test item: 3 replicates; reference items: 6 replicates, sodium nitrate (dead time determination): 3 replicates
EVALUATION
- Calculation of capacity factors k': the capacity factor k' was calculated according to the equation: k'=tr-to/to (with tr=retention time of the test item or reference item, to=dead time)
- Calculation of retention times: not applicable
- Determination of the log Koc value: the adsorption coefficient (Koc) was deduced from the capacity factor k' using a calibration plot of log k' versus log Koc of the selected reference items - Type:
- log Koc
- Value:
- > 5.63
- Temp.:
- 25 °C
- Details on results (HPLC method):
- - Retention times of reference substances used for calibration: acetanilide: 2.98 min, isoproturon: 3.32 min, linuron: 3.72 min, pyrazophos: 4.38 min, dicyclofop-methyl: 4.71 min, and 2,4-DDT: 6.15 min
- Details of fitted regression line (log k' vs. log Koc): slope: 0.106; y-axis intercept: -0.054; coefficient of regression: 0.999
- Average retention data for test substance: not applicable as the test item could not be eluted from the column - Validity criteria fulfilled:
- yes
- Conclusions:
- The soil sorption coefficient of the test item was estimated to be > 427,000 (log Koc>5.63). This value would indicate that the test substance will be adsorbed by organic carbon in soil. Based on the results, the test item can be regarded as immobile in soil. According to the statement in the guideline, however, the method may not work for surface-active substances and the results (test substance was not eluted from the column) confirm this statement
- Executive summary:
In a study conducted according to OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC; 2001)) and EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC; 2001)) the soil sorption coefficient Koc was determined to be >427,000 (log Koc>5.63. This value would indicate that the test substance will be adsorbed by organic carbon in soil. Based on the results, the test item can be regarded as immobile in soil. According to the statement in the guideline, however, the method may not work for surface-active substances and the results (test substance was not eluted from the column) confirm this statement
Reference
Description of key information
Partially unsaturated IQAC, DMS quaternised will strongly interact with soils, sediment and suspended matter in natural environment. It is technically not feasible to determine a concrete soil sorption coefficient
Key value for chemical safety assessment
- Koc at 20 °C:
- 427 000
Additional information
In a study according the EC C.19 guideline (OECD 121) the adsorption coefficient Koc of Partially unsaturated IQAC, DMS quaternised was studied. It was found that the test item strongly interacted with the analytical column. The reference substance 2,4 -DDT was detected and had a retention time of 6.15 minutes. Based on the results obtained it was concluded that the test substance has a Koc value of higher than the reference substance 2,4-DDT. It corresponds with Koc and log Koc value for the test substance of>427,000 (log Koc>5.63, respectively. A concrete soil sorption coefficient could not be determined as the test item was not eluted from the column. In the guideline, however, it is stated that the method may not work for surface active substances and the results confirm this. Therefore, this study is not appropriate to determine the soil sorption coefficient.
[LogKoc: 5.63]
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