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EC number: 955-212-4 | 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
Biodegradation in soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in soil: simulation testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 8 June 2018 - 15 April 2020
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 307 (Aerobic and Anaerobic Transformation in Soil)
- Deviations:
- yes
- Remarks:
- The temperature reached a maximum of 2.5°C above tolerance and a minimum of 0.9°C below tolerance, deviations which are not considered to affect the integrity or the outcome of the study.
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Particle size, pH, organic carbon and cation exchange capacity (by NRM) and water content at pF2 (by CEMAS) were measured in separate non-GLP studies.
- Test type:
- laboratory
- Radiolabelling:
- yes
- Oxygen conditions:
- aerobic
- Soil no.:
- #1
- Soil type:
- other: sand (Cuckney soil)
- % Clay:
- 7
- % Silt:
- 4
- % Sand:
- 89
- % Org. C:
- 1.3
- pH:
- 7.2
- CEC:
- 5.2 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.313
- Soil no.:
- #2
- Soil type:
- other: clay loam (Drayton soil)
- % Clay:
- 33
- % Silt:
- 23
- % Sand:
- 44
- % Org. C:
- 2
- pH:
- 7.6
- CEC:
- 26 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.227
- Soil no.:
- #3
- Soil type:
- other: sandy clay loam (Elmton soil)
- % Clay:
- 25
- % Silt:
- 24
- % Sand:
- 51
- % Org. C:
- 2.7
- pH:
- 8
- CEC:
- 20.5 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.169
- Soil no.:
- #4
- Soil type:
- other: sandy loam (Calke soil)
- % Clay:
- 16
- % Silt:
- 22
- % Sand:
- 62
- % Org. C:
- 2.8
- pH:
- 6.1
- CEC:
- 13.2 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.147
- Details on soil characteristics:
- The test soils were supplied by LandLook (Midlands), UK, and LRA Labsoil, UK. The soils were passed through a 2 mm sieve. Additional water was added to bring the water content of the soils to that equivalent to pF2. Microbial biomass measurements conducted at the start and end of the incubation period demonstrated that all soils were microbiologically viable throughout. Additional details on soil characteristics are provided in Table 1 (below).
- Soil No.:
- #1
- Duration:
- 119 d
- Soil No.:
- #2
- Duration:
- 119 d
- Soil No.:
- #3
- Duration:
- 119 d
- Soil No.:
- #4
- Duration:
- 119 d
- Initial conc.:
- 1.02 mg/kg soil d.w.
- Based on:
- other:
- Remarks:
- Application rate calculated from radioactivity and volume applied, and specific activity of the test material. The radiochemical purity of [14C]-test item was confirmed by HPLC prior to application to be 96.8%.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- radiochem. meas.
- Soil No.:
- #1
- Temp.:
- 12 +/- 2 deg C
- Humidity:
- pF2
- Microbial biomass:
- Non-treated: 664 mg C/kg soil (Day 0); 571 mg C/kg soil (Day 119); Solvent (THF) treated: 562 mg C/kg soil (Day 119)
- Soil No.:
- #2
- Temp.:
- 12 +/- 2 deg C
- Humidity:
- pF2
- Microbial biomass:
- Non-treated: 411 mg C/kg soil (Day 0); 715 mg C/kg soil (Day 119); Solvent (THF) treated: 684 mg C/kg soil (Day 119)
- Soil No.:
- #3
- Temp.:
- 12 +/- 2 deg C
- Humidity:
- pF2
- Microbial biomass:
- Non-treated: 1804 mg C/kg soil (Day 0); 1582 mg C/kg soil (Day 119); Solvent (THF) treated: 1587 mg C/kg soil (Day 119)
- Soil No.:
- #4
- Temp.:
- 12 +/- 2 deg C
- Humidity:
- pF2
- Microbial biomass:
- Non-treated: 1504 mg C/kg soil (Day 0); 1110 mg C/kg soil (Day 119); Solvent (THF) treated: 1092 mg C/kg soil (Day 119)
- Details on experimental conditions:
- Individual soil samples (approximately 50 g soil on a dry weight basis) treated with radiolabeled (14C) test item were contained in glass dishes and housed in glass chambers. Aliquots of a stock solution of [14C]-test item, prepared in tetrahydrofuran (THF) at a nominal concentration of 500 µg/mL, were applied to the surface of each soil sample. The solvent was allowed to evaporate and the soil was mixed using a spatula. Each dish was weighed and distilled water added as necessary to maintain the moisture content at that equivalent to pF2.
Each chamber was incorporated into a separate gas flow-through system arranged in a series as follows: a humidifying vessel (with sintered stem for uniform gas dispersion) containing water to humidify the air-flow; a chamber containing the dishes of soil; a vessel containing ethyl digol(to trap organic volatile compounds; a vessel containing 1M aqueous potassium hydroxide solution with phenolphthalein indicator to trap 14CO2; and a non-return valve to prevent accidental backflow through the test apparatus. Each chamber only contained dishes of one soil type. During the acclimatization phase all traps except the humidifying water bottle were empty.
Vessels (1000 mL) for microbiological activity measurement, each containing approximately 500 g soil on a dry weight basis, were connected in one or more series to separate gas flow systems. Vessels used for microbial activity measurements were not treated with the test item; however, two of the five vessels for each soil type were used as a solvent-control and were treated with an equivalent volume of organic solvent as used for test item application. Humidified air was passed through these vessels, but no traps were included.
The air flow was maintained at approximately 60 mL/minute. The test systems were incubated at 12 +/- 2 deg C in the dark in a temperature-controlled room. The temperature of the incubation room deviated from the specified range on four occasions due to a failure of the cooling unit for the room. As the temperature reached a maximum of 2.5°C above tolerance and a minimum of 0.9°C below tolerance, with exceedances during only 5% of the total incubation period (119 days), it is considered that these temperature deviations did not affect the integrity or the outcome of the study. This is supported by the TLC analyses, which indicate that no degradation of the test item occurred.
Duplicate dishes of each soil type were taken for analysis immediately after application and after 7, 14, 31, 60, 90 and 119 days of incubation. Trapping solutions were taken for analysis and replaced with fresh media as necessary at 7, 14, 31, 45, 60, 74, 90, 104 and 119 days after application. One untreated vessel of each soil type, established for the determination of microbial biomass, was taken for analysis on the day of application. One untreated and one solvent-treated vessel of each soil type were taken for analysis after 119 days of incubation. - Remarks on result:
- not determinable
- Transformation products:
- no
- Remarks:
- ; mostly unchanged test item was detected from the TLC analysis of all soil extracts, with only minor amounts of unassigned radioactivity (up to 6.4% applied radioactivity).
- Details on transformation products:
- There was very little evidence for degradation of test item in the soils. The mean proportions of test item relative to total radioactive components in the soils ranged from 93.4% to 101.7% applied radioactivity in Cuckney soil (#1), 84.6% to 96.2% applied radioactivity in Drayton soil (#2), 85.9% to 99.0% applied radioactivity in Elmton soil (#3), and 86.8% to 99.6% applied radioactivity in Calke soil (#4).
The retention factor of parent test item in the TLC analyses shifted throughout testing. To investigate any possible degradation, selected extract pool samples with apparently different retention factors were analyzed together on the same plate. Two Elmton soil samples from different sampling intervals and three samples from the remaining soil types, were applied so the application bands of each group partially overlapped. The TLC plate was developed and imaged, confirming that the main band in all soils and sampling intervals were attributed to parent test item. - Details on results:
- Total recoveries of radioactivity (‘mass balances’, i.e. the sum of extractable and non extractable radioactivity in soil and volatile radioactivity) in the individual soil samples were in the range 92.6 to 107.8% of the amount of applied radioactivity (AR), except for Calke soil sample CA13 (Day 119, 112.9% AR). Mean distribution and recovery of radioactivity in the four soils are summarized in Table 2 (below).
- Conclusions:
- Mean distribution and recovery of radioactivity ranged from 99.7 to 106.2% AR in Cuckney soil, 93.9 to 103.4% AR in Drayton soil, 97.6 to 107.2% AR in Elmton soil, and 95.2 to 106.2% AR in Calke soil. Low levels of radioactivity were detected in the bound residues (mean values =10.6% applied radioactivity) and mean mineralization of the test item to CO2 was less than or equal to 0.9% applied radioactivity. There was little or no evidence for degradation of test material in soil at 12 +/- 2 deg C and pF2, under aerobic conditions, and kinetic analysis of the data was therefore considered inappropriate.
- Executive summary:
The fate of test material was studied in four soils types under laboratory conditions based on the aerobic test design in OECD Guideline for the Testing of Chemicals No. 307 (April 2002). Samples of each soil type were allowed to acclimatize before being treated with [14C]-test item at a rate of 1.02 mg/kg. The samples were incubated at approximately 12 deg C, in the dark and at a moisture content equivalent to pF2, for periods of up to 119 days after application.
The overall recoveries of radioactivity from the individual soil samples were in the range 92.6 to 107.8% applied radioactivity (AR), except for one Calke sample (Day 119, 112.9% AR). Extractable radioactivity showed a small decline over the incubation period in the four soils treated. Immediately after application of [14C]-test item, 97.7 to 105.3% applied radioactivity was extracted from the soils, declining to 90.1-100.7% applied radioactivity after 119 days. Non-extractable radioactivity remained approximately constant over the study, with mean values of 1.3 to 5.8% applied radioactivity at time zero and 1.8-6.8% after 119 days. Very little volatile radioactivity was recovered in the trapping solutions (=0.9% applied radioactivity after 119 days), all presumed to be associated with 14-CO2.
Mass balance (i.e. the sum of extractable and non-extractable radioactivity in soil and volatile radioactivity) ranged from 99.7 to 106.2% AR in Cuckney soil, 93.9 to 103.4% AR in Drayton soil, 97.6 to 107.2% AR in Elmton soil, and 95.2 to 106.2% AR in Calke soil.
Mostly test material was detected in the extracts of all four soils. There was little or no evidence for degradation of test item and kinetic analysis of the data was therefore considered inappropriate.
Reference
Table 2: Mean Distribution and Recovery of Radioactivityin Four Treated Soils
Cuckney Soil (#1)
Fraction |
Sampling time (days) |
||||||
0 |
7 |
14 |
31 |
60 |
90 |
119 |
|
Total extractable |
104.9 |
97.7 |
98.1 |
99.4 |
97.0 |
95.8 |
97.8 |
Non-extractable |
1.3 |
2.4 |
1.5 |
1.2 |
1.8 |
1.7 |
1.8 |
Total in soil |
106.2 |
100.0 |
99.6 |
100.5 |
98.7 |
97.4 |
99.6 |
Volatiles: |
|
|
|
|
|
|
|
Organics |
na |
nd |
nd |
nd |
nd |
nd |
nd |
CO2 |
na |
0.1 |
0.1 |
0.2 |
0.2 |
0.3 |
0.3 |
Total volatiles |
na |
0.1 |
0.1 |
0.2 |
0.2 |
0.3 |
0.3 |
Total recovered |
106.2 |
100.1 |
99.7 |
100.7 |
98.9 |
97.7 |
99.9 |
Results expressed as % applied radioactivity.
nd Not detected
na Not applicable
Drayton Soil (#2)
Fraction |
Sampling time (days) |
||||||
0 |
7 |
14 |
31 |
60 |
90 |
119 |
|
Total extractable |
97.7 |
88.5 |
89.4 |
93.8 |
91.2 |
93.2 |
90.1 |
Non-extractable |
5.8 |
5.3 |
4.8 |
2.3 |
3.0 |
2.3 |
6.8 |
Total in soil |
103.4 |
93.8 |
94.2 |
96.1 |
94.1 |
95.5 |
96.9 |
Volatiles: |
|
|
|
|
|
|
|
Organics |
na |
nd |
nd |
nd |
nd |
nd |
nd |
CO2 |
na |
0.1 |
0.1 |
0.2 |
0.3 |
0.3 |
0.5 |
Total volatiles |
na |
0.1 |
0.1 |
0.2 |
0.3 |
0.3 |
0.5 |
Total recovered |
103.4 |
93.9 |
94.3 |
96.3 |
94.4 |
95.8 |
97.4 |
Results expressed as % applied radioactivity.
nd Not detected
na Not applicable
Elmton Soil (#3)
Fraction |
Sampling time (days) |
||||||
0 |
7 |
14 |
31 |
60 |
90 |
119 |
|
Total extractable |
105.3 |
88.6 |
100.4 |
101.2 |
97.2 |
97.9 |
98.1 |
Non-extractable |
1.9 |
9.0 |
2.6 |
1.7 |
2.2 |
2.1 |
2.9 |
Total in soil |
107.2 |
97.5 |
103.0 |
102.8 |
99.3 |
100.0 |
101.0 |
Volatiles: |
|
|
|
|
|
|
|
Organics |
na |
nd |
nd |
nd |
nd |
nd |
nd |
CO2 |
na |
0.1 |
0.1 |
0.2 |
0.3 |
0.4 |
0.6 |
Total volatiles |
na |
0.1 |
0.1 |
0.2 |
0.3 |
0.4 |
0.6 |
Total recovered |
107.2 |
97.6 |
103.1 |
103.0 |
99.6 |
100.4 |
101.6 |
Results expressed as % applied radioactivity.
nd Not detected
na Not applicable
Calke Soil (#4)
Fraction |
Sampling time (days) |
||||||
0 |
7 |
14 |
31 |
60 |
90 |
119 |
|
Total extractable |
103.1 |
88.8 |
90.0 |
97.2 |
93.0 |
93.6 |
100.7 |
Non-extractable |
3.1 |
10.6 ^a |
5.1 |
1.9 |
2.6 |
2.6 |
3.6 |
Total in soil |
106.2 |
99.3 |
95.1 |
99.0 |
95.6 |
96.2 |
104.3 |
Volatiles: |
|
|
|
|
|
|
|
Organics |
na |
nd |
nd |
nd |
nd |
nd |
nd |
CO2 |
na |
0.1 |
0.1 |
0.3 |
0.4 |
0.7 |
0.9 |
Total volatiles |
na |
0.1 |
0.1 |
0.3 |
0.4 |
0.7 |
0.9 |
Total recovered |
106.2 |
99.4 |
95.2 |
99.3 |
96.0 |
96.9 |
105.2 |
Results expressed as % applied radioactivity.
nd Not detected
na Not applicable
^a The mean recovery for Day 7 post-extraction soil debris was just over 10% applied radioactivity; however, no overall trend was observed for the non-extractable radioactivity and therefore the characterization by fractionation of this soil debris was not performed.
Description of key information
In an OECD 307 study, conducted according to GLP, the mean distribution and recovery of radioactivity ranged from 99.7 to 106.2% AR in Cuckney soil, 93.9 to 103.4% AR in Drayton soil, 97.6 to 107.2% AR in Elmton soil, and 95.2 to 106.2% AR in Calke soil. Low levels of radioactivity were detected in the bound residues (mean values =10.6% applied radioactivity) and mean mineralization of the test item to CO2 was less than or equal to 0.9% applied radioactivity. There was little or no evidence for degradation of test material in soil at 12 +/- 2 deg C and pF2, under aerobic conditions, and kinetic analysis of the data was therefore considered inappropriate.
Key value for chemical safety assessment
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