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EC number: 203-497-4 | CAS number: 107-51-7
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was conducted according to an appropriate OECD test guideline, and in compliance with GLP.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)
- GLP compliance:
- yes
- Type of method:
- batch equilibrium method
- Media:
- soil
- Radiolabelling:
- yes
- Test temperature:
- - Temperature: 23.7±0.1°C
- Analytical monitoring:
- yes
- Details on matrix:
- Soil 164
- Geographic location: Farditch Farm, Chelmorton, Buxton, Derbyshire, UK. location: Royal Agricultural Society of England, Stoneleigh Park, Stoneleigh, Warwickshire. Soil 248 location Hill Barn Farm, Snowhill, Broadway, Hereford and Worcester
- Storage conditions: Air dried soils refrigerated 5±4°C in sealed opaque bags
PROPERTIES
- Soil texture: Silt loam
- % sand: 22
- % silt: 56
- % clay: 22
- pH: 6.6
- Organic carbon (%): 3.4
- CEC (meq/100 g): 18.0
- Bulk density (g/L): 890
- Water holding capacity (%): 41.1
Soil 248
- Geographic location: Royal Agricultural Society of England, Stoneleigh Park, Stoneleigh, Warwickshire, UK.
- Storage conditions: Air dried soils refrigerated 5±4°C in sealed opaque bags
PROPERTIES
- Soil texture: Sandy loam
- % sand: 72
- % silt: 13
- % clay: 15
- pH: 5.5
- Organic carbon (%): 2.0
- CEC (meq/100 g): 9.9
- Bulk density (g/L): 966
- Water holding capacity (%): 16.4
Soil 282
- Geographic location: Hill Barn Farm, Snowhill, Broadway, Hereford and Worcester, UK.
- Storage conditions: Air dried soils refrigerated 5±4°C in sealed opaque bags
PROPERTIES
- Soil texture: Sandy loam
- % sand: 61
- % silt: 19
- % clay: 20
- pH: 8.3
- Organic carbon (%): 5.5
- CEC (meq/100 g): 20.4
- Bulk density (g/L): 920
- Water holding capacity (%): 31.4 - Details on test conditions:
- TEST CONDITIONS
- pH: 5.5 to 8.3
TEST SYSTEM
- Type, size and further details on reaction vessel: 20 mm x 125 mm borosilicate glass tube
- Amount of soil/sediment/sludge and water per treatment (if simulation test): 0.25 g dry weight
- Soil/sediment/sludge-water ratio (if simulation test): 1:50
- Number of reaction vessels/concentration: For isotherm experiments: 10, 23, 63, 160, 400, 800 ng 13C-L3 per tube.
- Measuring equipment: Calibrated balance
- Test performed in closed vessels due to significant volatility of test substance: Yes
- Method of preparation of test solution: moist test soil and 0.01 M CaCl2 solution added to test vessels and equilibrated overnight by mixing on a rotational mixer. At initiation of each experiment, the vessels were removed from the mixer, a 25 µL aliquot of spike solution (13C-L3 in DMF) was added and the vessel was immediately returned to the mixer in the incubator for the predetermined equilibrium time - Duration:
- 24 h
- Duration:
- 24 h
- Type:
- log Koc
- Value:
- 4.34
- Temp.:
- 23.7 °C
- Remarks on result:
- other: Overall average over different soils
- Type:
- log Koc
- Value:
- 4.28
- Temp.:
- 23.7 °C
- % Org. carbon:
- 3.4
- Remarks on result:
- other: Soil 164
- Type:
- log Koc
- Value:
- 4.37
- Temp.:
- 23.7 °C
- % Org. carbon:
- 2
- Remarks on result:
- other: Soil 248
- Type:
- log Koc
- Value:
- 4.38
- Temp.:
- 23.7 °C
- % Org. carbon:
- 5.5
- Remarks on result:
- other: Soil 282
- Adsorption and desorption constants:
- Desorption log Koc 4.35 (overall average over different soils)
Desorption log Koc: 4.27 (Soil 164); 4.35 (Soil 248); 4.42 (Soil 282). - Recovery of test material:
- Average mass balance ranged from 66 ± 9% to 88 ±5 % for adsorption and 55 ± 5% to 76 ±3% for desorption. These results were noticeably low, and probably due to loss of L3 from the aqueous phase through volatilisation and degradation. However, the similarity in the Koc values for L3 when approaching equilibrium from opposite directions (i.e. adsorption vs. desorption) indicated that the losses were sufficiently slow so as to not affect the Koc measurement.
- Validity criteria fulfilled:
- yes
- Conclusions:
- An adsorption log Koc value of 4.34 at 23.7 °C (overall average over three different soils) and desorption log Koc value of 4.35 at 23.7 °C (overall average over three different soils) were determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.
Reference
Table 1: Concentration of L3 in the solid and liquid phases at the end of adsorption equilibration period
Concentration (ng 13C-L3 per tube) |
Soil 164 (OC 3.4%) |
Soil 248 (OC 2.0%) |
Soil 282 (OC 5.5%) |
|||||||||
on soil (ng/g) |
in solution (ng/g) |
Kd |
Log Koc |
on soil (ng/g) |
in solution (ng/g) |
Kd |
Log Koc |
on soil (ng/g) |
in solution (ng/g) |
Kd |
Log Koc |
|
10 |
7.523 |
0.01057 |
712 |
4.32 |
8.183 |
0.01314 |
623 |
4.49 |
8.161 |
0.005370 |
1520 |
4.44 |
6.541 |
0.01108 |
590 |
4.24 |
5.860 |
0.01318 |
444 |
4.35 |
7.411 |
0.006294 |
1177 |
4.33 |
|
23 |
19.52 |
0.02919 |
669 |
4.29 |
17.74 |
0.03645 |
487 |
4.39 |
21.28 |
0.01541 |
1374 |
4.40 |
20.64 |
0.02999 |
688 |
4.31 |
15.19 |
0.03546 |
428 |
4.33 |
20.01 |
0.01468 |
1363 |
4.39 |
|
63 |
48.50 |
0.07025 |
690 |
4.31 |
39.87 |
0.08469 |
471 |
4.37 |
51.32 |
0.03954 |
1298 |
4.37 |
46.68 |
0.07052 |
662 |
4.29 |
35.90 |
0.7882 |
455 |
4.36 |
53.70 |
0.03820 |
1406 |
4.41 |
|
160 |
143.3 |
0.2234 |
642 |
4.28 |
87.78 |
0.1837 |
478 |
4.38 |
124.7 |
0.09203 |
1355 |
4.39 |
127.3 |
0.1900 |
670 |
4.29 |
99.44 |
0.2137 |
465 |
4.37 |
132.9 |
0.1031 |
1289 |
4.37 |
|
400 |
289.8 |
0.4565 |
635 |
4.27 |
290.4 |
0.6437 |
451 |
4.35 |
369.4 |
0.2775 |
1331 |
4.38 |
311.9 |
0.5027 |
620 |
4.26 |
267.8 |
0.5989 |
447 |
4.35 |
328.4 |
0.2741 |
1198 |
4.34 |
|
800 |
741.1 |
1.173 |
632 |
4.27 |
531.5 |
1.183 |
449 |
4.35 |
778.8 |
0.6289 |
1238 |
4.35 |
712.7 |
1.210 |
589 |
4.24 |
537.7 |
1.267 |
424 |
4.33 |
764.0 |
0.6096 |
1253 |
4.36 |
|
Average |
|
650 |
4.28 |
|
469 |
4.37 |
|
1317 |
4.38 |
Description of key information
Adsorption / desorption: adsorption log Koc 4.34 at 23.7 °C (overall average over three different soils); desorption log Koc 4.35 at 23.7 °C (overall average over three different soils)
Key value for chemical safety assessment
- Koc at 20 °C:
- 21 877.616
Additional information
An adsorption log Koc value of 4.34 at 23.7 °C (overall average over three different soils) and a desorption log Koc value of 4.35 at 23.7 °C (overall average over three different soils) were determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.
[LogKoc: 4.34]
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