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EC number: 264-980-3 | CAS number: 64628-44-0
- 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:
- In-life initiated/completed: 20-Feb-2009 to 06-May-2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 307 (Aerobic and Anaerobic Transformation in Soil)
- Version / remarks:
- April 24, 2002
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: Commission Directive 95/36/EC (Annexes II and III, Fate and Behaviour in the Environment)
- Version / remarks:
- July 14, 1995 - amending Council Directive 91/414/EEC
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test type:
- laboratory
- Radiolabelling:
- not specified
- Oxygen conditions:
- aerobic
- Soil classification:
- USDA (US Department of Agriculture)
- Year:
- 2 009
- Soil no.:
- #1
- Soil type:
- loam
- % Clay:
- 21
- % Silt:
- 30
- % Sand:
- 49
- % Org. C:
- 1.7
- pH:
- 5.8
- CEC:
- 10.3 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.13
- % Moisture content:
- 54.6
- Soil no.:
- #2
- Soil type:
- clay loam
- % Clay:
- 33
- % Silt:
- 46
- % Sand:
- 21
- % Org. C:
- 5.4
- pH:
- 7.4
- CEC:
- 20.6 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 0.96
- % Moisture content:
- 94.8
- Soil no.:
- #3
- Soil type:
- clay loam
- % Clay:
- 31
- % Silt:
- 45
- % Sand:
- 24
- % Org. C:
- 0.9
- pH:
- 7.8
- CEC:
- 11.4 meq/100 g soil d.w.
- Bulk density (g/cm³):
- 1.14
- % Moisture content:
- 43.1
- Details on soil characteristics:
- Soil #1: Laacher Hof "Wurmwiese" (Soil ID: WW)
Soil #2: Dollendorf II (Soil ID: DD)
Soil #3: Les Cayades (Soil ID: LC) - Soil No.:
- #1
- Duration:
- 32 d
- Soil No.:
- #2
- Duration:
- 32 d
- Soil No.:
- #3
- Duration:
- 32 d
- Soil No.:
- #1
- Initial conc.:
- 240 other: µg a.s./kg soil d.w.
- Based on:
- other: single maximum field use rate
- Soil No.:
- #2
- Initial conc.:
- 240 other: µg a.s./kg soil d.w.
- Based on:
- other: single maximum field use rate
- Soil No.:
- #3
- Initial conc.:
- 240 other: µg a.s./kg soil d.w.
- Based on:
- other: single maximum field use rate
- Soil No.:
- #1
- Temp.:
- 19.7°C
- Humidity:
- 55 ± 5 % MWHC
- Microbial biomass:
- Study start, without/with application solvent: 503/550 mg C/kg soil.
Study end, without/with application solvent: 471/488 mg C/kg soil. - Soil No.:
- #2
- Temp.:
- 19.7°C
- Humidity:
- 55 ± 5 % MWHC
- Microbial biomass:
- Study start, without/with application solvent: 3568/3678 mg C/kg soil.
Study end, without/with application solvent: 3363/3234 mg C/kg soil. - Soil No.:
- #3
- Temp.:
- 19.7°C
- Humidity:
- 55 ± 5 % MWHC
- Microbial biomass:
- Study start, without/with application solvent: 217/231 mg C/kg soil.
Study end, without/with application solvent: 228/250 mg C/kg soil. - Key result
- Soil No.:
- #1
- DT50:
- 3.5 d
- Temp.:
- 19.7 °C
- Key result
- Soil No.:
- #2
- DT50:
- 1.7 d
- Temp.:
- 19.7 °C
- Key result
- Soil No.:
- #3
- DT50:
- 7.3 d
- Temp.:
- 19.7 °C
- Transformation products:
- not specified
- Details on results:
- During study incubation the concentration of the test item decreased rapidly in all soils, dropping below 10 % of the applied 7 to 32 days after application. At study termination, the residue levels were 5.0, 3.5 and 2.2 % of the applied amount for soils Laacher Hof "Wurmwiese", Dollendorf II and Les Cayades, respectively.
- Conclusions:
- The test item Triflumuron was found to degrade rapidly in a typical soil environment under aerobic laboratory conditions. The decline occurred with calculated DT50 values of 1.7 to 7.3 days in the three soils tested. Due to its short half-life, Triflumuron is unlikely to accumulate in viable soils. The present study demonstrated Triflumuron to be rapidly degraded in typical agricultural soils under aerobic laboratory conditions. Therefore, the compound will not persist in a viable soil environment.
- Executive summary:
The degradation of the insecticidal compound Triflumuron was tested in three different soils of European origin. A loam (Laacher Hof "Wurmwiese": pH(CaCl2) 5.6, 1.7 % OC) and two clay loam type soils (Dollendorf II: pH(CaCl2) 7.3, 5.4 % OC; Les Cayades: pH(CaCl2) 7.6, 0.9 % OC) from Germany and France were applied with Triflumuron and studied for up to 32 days under aerobic laboratory conditions in the dark, at 20 ± 1°C and 55 ± 5 % of MWHC soil moisture. The experiment was conducted in accordance with the OECD Guideline for Testing of Chemicals No. 307 [1] and the Commission Directive 95/36/EC amending Council Directive 91/414/EEC. The study was conducted in compliance with the OECD Principles of Good Laboratory Practice, current version and the Principles of Good Laboratory Practice – German Chemical Law (Chemikaliengesetz), current version of Annex 1. The amount of the test item for the treatment of the incubation flasks was 240 μg Triflumuron per kg of soil dry weight. This trial application rate was based on the single maximum field use rate (180 g/ha). The calculation was performed according to OECD Test Guideline No. 307 for conversion of field application rate (FAR, kg/ha) into trial application rate (TAR, mg/kg soil), assuming a homogeneous distribution of Triflumuron in a topsoil layer of 5 cm depth at a generic soil bulk density of 1.5 g/cm³. The test systems consisted of open Erlenmeyer glass flasks each containing 100 g of soil dry weight equivalents (static test system design). Samples were analyzed after 0, 0.25, 1, 2, 4 and 7 days of incubation for all soils. In addition, samples for soil Laacher Hof "Wurmwiese" were analyzed on day 14 and for soil Les Cayades on days 14, 21 and 32. Duplicate test systems were taken per sampling interval. The entire soil per flask was processed two times at ambient temperature and once by microwave-accelerated solvent extraction using acetonitrile. The combined extracts were analysed for Triflumuron residues by reversed phase high performance liquid chromatography/mass spectrometry (HPLC-MS/MS) in multiple reaction monitoring (MRM) mode using matrix-matched non-labeled Triflumuron standards. Method development and validation was performed successfully within this study prior to soil sample analyses. In addition, recovery tests concurrent to all sample analyses were performed. The recovered mean amount of Triflumuron directly after soil treatment was 98.7, 96.0 and 97.2 % of the applied for soils Laacher Hof "Wurmwiese", Dollendorf II and Les Cayades, respectively. During study incubation the concentration of the test item decreased rapidly in all soils, dropping below 10 % of the applied 7 to 32 days after application. At study termination, the residue levels were 5.0, 3.5 and 2.2 % of the applied amount for soils Laacher Hof "Wurmwiese", Dollendorf II and Les Cayades, respectively. Triflumuron was found to rapidly dissipate from soils under aerobic laboratory conditions, with typical half-lives of 3.5, 1.7 and 7.3 days for soils Laacher Hof "Wurmwiese", Dollendorf II and Les Cayades, respectively. Therefore, the compound will not persist in a viable soil environment.
Reference
Description of key information
The test item Triflumuron was found to degrade rapidly in a typical soil environment under aerobic laboratory conditions. The decline occurred with calculated DT50 values of 1.7 to 7.3 days in the three soils tested. Due to its short half-life, Triflumuron is unlikely to accumulate in viable soils. The present study demonstrated Triflumuron to be rapidly degraded in typical agricultural soils under aerobic laboratory conditions. Therefore, the compound will not persist in a viable soil environment. The Half-life value of 7.3 d at 20°C in soil has been converted to 15.5 d at 12°C using the Arrhenius equation.
Key value for chemical safety assessment
- Half-life in soil:
- 15.5 d
- at the temperature of:
- 12 °C
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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