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EC number: 619-290-0 | CAS number: 97780-06-8
- 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
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: U.S. EPA Pesticide Assessment Guidelines, Subdivision N, 163-1 (1982)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- batch equilibrium method
- Media:
- soil
Test material
- Reference substance name:
- Reference substance 002
- Cas Number:
- 97780-06-8
- Test material form:
- solid
- Details on test material:
- Purity: 85-99%
Constituent 1
- Specific details on test material used for the study:
- Radiochemical purity: 97.1%; Specific activity: 39.55 µCi/mg
- Radiolabelling:
- yes
- Remarks:
- phenyl label
Study design
- Test temperature:
- 20 ± 2°C
Batch equilibrium or other method
- Analytical monitoring:
- yes
Matrix propertiesopen allclose all
- Matrix no.:
- #1
- Matrix type:
- clay loam
- % Clay:
- 32
- % Silt:
- 48
- % Sand:
- 20
- % Org. carbon:
- 2.9
- pH:
- 6.4
- CEC:
- 27.2 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.1
- Matrix no.:
- #2
- Matrix type:
- loam
- % Clay:
- 12
- % Silt:
- 46
- % Sand:
- 42
- % Org. carbon:
- 0.5
- pH:
- 8.2
- CEC:
- 11.2 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.09
- Matrix no.:
- #3
- Matrix type:
- sandy loam
- % Clay:
- 14
- % Silt:
- 32
- % Sand:
- 54
- % Org. carbon:
- 1.4
- pH:
- 7.7
- CEC:
- 9.2 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.12
- Matrix no.:
- #4
- Matrix type:
- silty clay
- % Clay:
- 44
- % Silt:
- 44
- % Sand:
- 12
- % Org. carbon:
- 1.8
- pH:
- 7.6
- CEC:
- 19.1 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.06
- Matrix no.:
- #5
- Matrix type:
- sandy loam
- % Clay:
- 9
- % Silt:
- 24
- % Sand:
- 67
- % Org. carbon:
- 1.2
- pH:
- 5.7
- CEC:
- 6.1 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.22
Duration of adsorption equilibration
- Duration:
- 24 h
- Initial conc. measured:
- >= 0.003 - <= 0.3 other: µg/mL
- Temp.:
- >= 18 - <= 22 °C
- Remarks:
- For all the samples
Duration of desorption equilibration
- Duration:
- 24 h
- Conc. of adsorbed test mat.:
- 0.3 other: µg/mL
- Temp.:
- 20 °C
- Remarks:
- For all the samples
Results and discussion
Adsorption coefficientopen allclose all
- Key result
- Sample No.:
- #1
- Type:
- Kd
- Value:
- 19.37 other: mL/g
- Matrix:
- Clay loam
- % Org. carbon:
- 2.9
- Key result
- Sample No.:
- #2
- Type:
- Kd
- Value:
- 0.22 other: mL/g
- Matrix:
- Loam
- % Org. carbon:
- 0.5
- Key result
- Sample No.:
- #3
- Type:
- Kd
- Value:
- 0.56 other: mL/g
- Matrix:
- Sandy loam
- % Org. carbon:
- 1.4
- Key result
- Sample No.:
- #4
- Type:
- Kd
- Value:
- 0.83 other: mL/g
- Matrix:
- Silty clay
- % Org. carbon:
- 1.8
- Key result
- Sample No.:
- #5
- Type:
- Kd
- Value:
- 3.66 other: mL/g
- Matrix:
- Sandy loam
- % Org. carbon:
- 1.2
- Key result
- Sample No.:
- #1
- Type:
- Koc
- Value:
- 667.9 other: mL/g
- Matrix:
- Clay Loam
- Key result
- Sample No.:
- #2
- Type:
- Koc
- Value:
- 44.6 other: mL/g
- Matrix:
- Loam
- Key result
- Sample No.:
- #3
- Type:
- Koc
- Value:
- 39.7 other: mL/g
- Matrix:
- Sandy Loam
- Key result
- Sample No.:
- #4
- Type:
- Koc
- Value:
- 45.9 other: mL/g
- Matrix:
- Silty Clay
- Key result
- Sample No.:
- #5
- Type:
- Koc
- Value:
- 305.2 other: mL/g
- Matrix:
- Sandy Loam
Results: Batch equilibrium or other method
- Recovery of test material:
- The average material balance ranged from 97.2 to 107.9% and is within the acceptable guideline range of 90-110% of the applied radioactivity.
Mass balance (%) at end of desorption phaseopen allclose all
- Sample no.:
- #1
- Duration:
- 24 h
- % Desorption:
- 107.9
- Sample no.:
- #2
- Duration:
- 24 h
- % Desorption:
- 107.1
- Sample no.:
- #3
- Duration:
- 24 h
- % Desorption:
- 101.6
- Sample no.:
- #4
- Duration:
- 24 h
- % Desorption:
- 97.2
- Sample no.:
- #5
- Duration:
- 24 h
- % Desorption:
- 104.1
- Transformation products:
- no
Applicant's summary and conclusion
- Conclusions:
- Average sorption coefficient
Kd: 4.93 mL/g
Kom: 129.0 mL/g
Koc: 220.7 mL/g
Total percent of test item desorbed after both desorption intervals (DT):
Drummer soil: 31.9%
Porterville soil: 39.9%
Nambsheim soil: 44.4%
Lleida soil: 39.4%
Sassafras soil: 82.8% - Executive summary:
The adsorption and desorption properties of the test substance in five different soils was investigated in the laboratory using 14C-test substance according to the procedures outlined in U.S. EPA Pesticide Assessment Guidelines, Subdivision N, 163-1 and OECD Guideline for the Testing of Chemicals, OECD 106 (January 2000). The adsorption coefficients Kd, Kom, and Koc, and the Freundlich adsorption isotherm parameters KF, KFom, KFoc and 1/n were calculated for Drummer, Porterville (California), Lleida, Nambsheim and Sassafras #16 soils.
The texture of the soils included a clay loam (Drummer), a loam (Porterville or California), two sandy loams (Nambsheim and Sassafras #16) and a silty clay (Lleida). The percent organic matter (Walkley-Black method) of the soils ranged from 0.9-5.0% and the pH in 0.01 M CaCl2 ranged from 5.0-7.9.
Adsorption experiment was performed using the batch equilibration method on the soils with five nominal test concentrations (0.003, 0.015, 0.03, 0.15 and 0.3 µg/mL) of the test item prepared in 0.01 M CaCl2. Two desorption cycles were performed on samples treated at the highest test concentration.
A 1:1, 1:5, or 1:10 (w/v) soil-to-solution ratio was used in the definitive testing. The sorption coefficients Kd, Kom and Koc were calculated for each soil at each concentration of the test item. A summary of the average sorption coefficients for each soil is given in the table below:
SOIL
Kd(mL/g)
Kom(mL/g)
Koc(mL/g)
Drummer
19.37
387.4
667.9
Porterville
0.22
24.8
44.6
Nambsheim
0.56
23.2
39.7
Lleida
0.83
26.6
45.9
Sassafras #16
3.66
183.1
305.2
Average
4.93
129.0
220.7
The values for the Freundlich adsorption isotherm parameter KF, KFom, KFoc, and 1/n were derived from the linear form of the Freundlich equation for all soils. A summary of the adsorption isotherm parameters for each soil is given in the table below:
SOIL
KF
KFOM
KFOC
1/n
R2
Drummer
10.66842
213.368
367.877
0.8697
0.9998
Porterville
0.19774
21.971
39.548
0.9754
0.9804
Nambsheim
0.36000
15.000
25.714
0.8879
0.9985
Lleida
0.74114
23.908
41.174
0.9771
0.9837
Sassafras # 16
1.46994
73.497
122.495
0.7827
0.9837
Average
2.68745
69.549
119.362
0.8986
0.9892
The percent 14C-test substance desorbed from the soils during two desorption intervals (D1 and D2) was calculated and totalled (DT) for all soils at the highest test solution concentration. The DT values ranged from 31.9% in the Drummer soil to 44.4% in the Nambsheim soil. In general, lower desorption values were observed in second desorption interval for all soils. The lowest desorption was observed in Drummer and Porterville soils in the first and second desorption interval, respectively whereas, the highest desorption was observed in Sassafras #16 soils in both desorption intervals (D1 and D2). A summary of the average percent desorption for each soil is given in the table below:
SOIL
D1(%)
D2(%)
DT(%)
Drummer
16.0
15.9
31.9
Porterville
24.5
15.5
39.9
Nambsheim
25.5
18.9
44.4
Lleida
24.0
15.4
39.4
Sassafras # 16
58.3
24.5
82.8
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