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EC number: 635-156-4 | CAS number: 109293-98-3
- 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
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
The hydrolysis rate of the test substance (diflufenzopyr) was determined at 1 ppm concentration in pH 5.0, pH 7.0, and pH 9.0 buffered aqueous solutions at 25 °C. The hydrolysis rate was 0.0538 ± 0.0038 day-1 at pH 5.0, 0.0290 ± 0.0011 day-1 at pH 7.0 and 0.0270 ± 0.0015 day-1 at pH 9.0. Thus the half-life of the test substance's hydrolysis was determined to be 12.9 days at pH 5.0, 23.9 days at pH 7.0 and 25.6 days at pH 9.0.
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 23.9 d
- at the temperature of:
- 25 °C
Additional information
The hydrolysis rate of the test substance (diflufenzopyr) was determined at 1 ppm concentration in pH 5.0, pH 7.0, and pH 9.0 buffered aqueous solutions at 25 °C (duration 30 days) according to EPA Pesticide Assessment Guidelines, Subdivision N, Chemistry: Environmental Fate, Section 161-1, October 18, 1982. The test substance hydrolyzed more rapidly in pH 5 buffer solution; about 17 % remained unchanged at day 31. The hydrolysis rate decreased in pH 7 buffered solution; approximetely 37 % remaining unchanged at day 31. The hydrolysis rate of the test substance in pH 7 and pH 9 buffered solution were similar with approximately 40 % of test substance remaining unchanged in pH 9 buffer solution at day 31.
The hydrolysis rate was 0.0538 ± 0.0038 day-1 at pH 5.0, 0.0290 ± 0.0011 day-1 at pH 7.0 and 0.0270 ± 0.0015 day-1 at pH 9.0. Thus the half-life of hydrolysis was determined to be 12.9 days at pH 5.0, 23.9 days at pH 7.0 and 25.6 days at pH 9.0.
TLC analysis detected a total of 8 radiocarbon spots (hydrolysis degradation products). These were compared to model degradation products for identification purposes via HPLC/MS analysis.
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