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EC number: 266-719-9 | CAS number: 67564-91-4
- 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 air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Study period:
- March 1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- according to guideline
- Guideline:
- other: BBA IV 6-1
- Principles of method if other than guideline:
- calculated according to Atkinson's method (Atkinson 1987)
- Details on test conditions:
- The rate constant for reactions of BAS 421 with OH radicals in the atmosphere was calculated according to Atkinson's method (Atkinson 1987).
- Key result
- DT50:
- 2.9 h
- Test condition:
- calculated according to Atkinson's method (1987)
- Conclusions:
- The half life of fenpropimorph was calculated to be 2.9 h.
Reference
At first, the rate constant kOH of the active substance was estimated based on the chemical structure. The resulting value was
kOH = 132 x 10 –12 cm3 / s
Because of a constant average OH radical concentration in the troposphere, the degradation of the active substance follows pseudo-first order kinetics with the rate constant k’ = kOH . (OH radicals):
-d(fenpropimorph) = k´(fenpropimorph)
The half life of this process was calculated by the following equation:
t1/2 = ln2/k' = ln2/kOH . (OH radicals).
The diurnally and seasonally averaged tropospheric OH radical concentration ((OH radicals)) for the northern hemisphere is 5 . 105 cm-3 (Crutzen, P.J. (1982) The Global Distribution of Hydroxyl, in Goldberg, E.D. (editor), Atmospheric Chemistry, Springer Verlag Berlin).
The half life of fenpropimorph was calculated to be 2.9 h.
Description of key information
Fenpropimorph has a high volatilisation potential. If reaching the troposphere, fenpropimorph is degraded very fast by photochemical processes with a half-life of 2.9 h.
Key value for chemical safety assessment
- Half-life in air:
- 2.9 h
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
The potential for short-range transport via air, i.e. volatilisation from the area of application and subsequent deposition on adjacent non-target areas was investigated for fenpropimorph in a wind tunnel system (BASF DocID 2004/1015210, 2004/1015214, 2004/1022511). Fenpropimorph containing formulation BAS 421 12 F (Corbel, 750 g/l) was applied together with formulated reference standard lindane to winter wheat (post emergence).
The trial was conducted on May 19, 2004 under controlled conditions in a wind tunnel at the Dienstleistungszentrum Ländlicher Raum (DLR) - Rheinpfalz, Breitenweg 71, D-67435 Neustadt, Germany. The wind tunnel has a length of approximately 55 m, a width of 6.5 m and a height of 3.1 m. At one end of the tunnel a wind engine with 26 synchron working fans was established. Between the wind engine and the target area there was a 5 m distance. The target area was 4 m wide and 25 m long (100 m2) with 1.25 m distance to the boundary at each side. The wind speed was set to 2 m/sec.
The flat target plot was cultivated with winter wheat ("Ritmo", 350 seeds/m2, BBCH 51), the surrounding area was grown with grass. Spraying was carried out in the morning (8:26 a.m. Central European Time) using a portable 4 m carbon boom sprayer with eight drift reducing nozzles (six Lechler ID 120-03 and one Lechler IS 80-03 at each end) at a pressure of 2.9 bar and a speed of about 2.25 km/h.
A theoretical tank mixture consisting of nominal 1 l/ha BAS 421 12 F (750 g/l fenpropimorph) and 550 ml/ha BAS 004 AA I (150 g/l lindan) in a water volume of 400 l/ha was adapted to the target area of 100 m2, i.e. the actual volume of the application solution was 3935 ml, the actual application time was 40 seconds while walking 25 m with the spraying device. The amount of fenpropimorph and lindane in the application solution was determined to be 1.61 g/l and 0.16 g/l corresponding to 633 g/ha and 64 g/ha, respectively.
Water containing stainless steel container were placed at different distances downwind of the application area. Samples for analyses were taken at 8 h (10 and 20 m distance) and at 24 h following application and the concentration values for fenpropimorph and lindane were determined (BASF DocID 2004/1015214).
Two samples with about 1 l volume were collected from every pan at each sampling. 200 ml aliquots of the water samples were automatically sucked through C18 columns and the analytes eluted with dichloromethane/methanol 9 + 1 (v/v) using a ZYMARK Autotrace. After concentration using a rotary evaporator the final analysis was performed by GC-MS according to analytical method CP 364 (BASF DocID 2000/1014823).
The results for the reference standard lindane clearly demonstrated that the experimental and climatic parameters of the wind tunnel were feasible to determine the deposition of volatile compounds over a study period of 24 hours. At a distance of 1 m beside the treated field 2.4 % of the applied lindane occurred in the pans. Between 3 m and 20 m distance 0.5-0.7 % of the applied amount was detected after 24 hours, i.e. the concentration of lindane significantly declined with increasing distance.
Fenpropimorph was detected in minor amounts of 0.01-0.06 % of the applied material. Neither sampling time (8 hours resp. 24 hours) nor the distance from the treated field lead to significant differences in the concentration of fenpropimorph. Even at a distance of 1 m beside the treated field no significant deposition occurred (0.04 % of applied after 24 hours). Therefore, transport via deposition after volatilisation plays only a minor role.
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