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EC number: 406-250-0 | CAS number: 72619-32-0 HALOXYFOP R-(+)-ME HERBICIDAL CHEMICAL
- 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
Phototransformation in soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in soil
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- EPA Guideline Subdivision N 161-3 (Photodegradation Studies on Soil)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: SETAC-Europe Procedures for Assessing the Environmental Fate and Ecotoxicity of Pesticides, Part 1, Section 2. "Soil Photolysis."
- Deviations:
- no
- GLP compliance:
- yes
- Specific details on test material used for the study:
- 14C-radiolabeled in the 3,4 positions of the pyridine ring (Lot # INV1532) or uniformly labeled in the phenyl ring (Lot # INV1585)
Specific activities: 28.1 mCi/mmol (pyridine label) and 18.3 mCi/mmoI (phenyl label)
Radiochemical purity: 97% (pyridine) and 98% (phenyl) - Radiolabelling:
- yes
- Analytical monitoring:
- yes
- Analytical method:
- high-performance liquid chromatography
- Details on soil:
- PROPERTIES
- Source: Marcham, UK
- Soil texture: Sandy clay loam soil
- % sand: 70.0
- % silt: 14.0
- % clay: 16.0
- pH: 7.9
- Organic carbon (%): 2.2
- CEC (meq/100 g): 17.3
- Bulk density (g/cm3): 1.19 - Light source:
- Xenon lamp
- Duration:
- 14.7 d
- Temp.:
- 20 °C
- Initial conc. measured:
- 3.4 other: µg/g
- Duration:
- 14.7 d
- Temp.:
- 20 °C
- Initial conc. measured:
- 3.2 other: µg/g
- Reference substance:
- yes
- Remarks:
- Non-radiolabeled test substance
- Dark controls:
- yes
- Remarks on result:
- other:
- Remarks:
- degradation occurs approximately seven times faster in the dark controls (k = 2.96 days-1) compared to the irradiated samples (k = 0.42 days-1), indicating that the test substance was stable to soil photolysis.
- Remarks on result:
- other: The test substance was stable to soil photolysis
- Transformation products:
- no
- Conclusions:
- The test substance was stable to soil photolysis
- Executive summary:
This study determined the rate and route of photo degradation of the test substance on one sandy clay loam air-dried soil. 14C-test substance, radiolabeled either uniformly in the phenyl ring or in the 3,4-positions of the pyridine ring was applied to soil at an average application rate of 113 g acid equivalent/ha. Soil hydrolysis of test substance to form DE-535-acid allowed for analysis of DE-535-acid photolysis as well.
Samples were continuously irradiated using a xenon arc lamp to simulate average summer sunlight intensity at 40° N latitude. In addition to time zero, irradiated samples and dark controls were collected at 0.9, 1.7, 4.9, 8.7, and 14.7 days after treatment (DAT). Due to continuous irradiation and lamp intensity, these sampling times were equivalent to 2.6, 4.9, 13.8, 24.5, and 41.3 days of summer sunlight at 40° N latitude.
Both the test substance and DE-535-acid were stable to photolysis.
The material balance for the irradiated samples ranged from 91.2% to 104.7% (average = 97.3 ± 4.3%). The material balance for the dark controls ranged from 90.5% to 106.7% (97.0 ± 4.3%).
Reference
Description of key information
Study Type |
Study Details | Value | Guideline | Reliability |
Phototransformation in soil | Applied on sandy clay loam air-dried soil |
Stable to photolysis |
EPA 161-3 |
1 |
Key value for chemical safety assessment
Additional information
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