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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
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
Based on mean measured concentrations of the test substance (diflufenzopyr sodium salt), the 14-day EC50 for frond density was estimated to be >0.35 mg A.E.(acid equivalent)/L. The 14-day No-Observed-Effect Concentration (NOEC) for frond density was determined to be 0.0039 mg A.E.(acid equivalent)/L. Based on mean measured concentrations, the 14-day EC50 based on frond biomass was estimated to be >0.35 mg A.E.(acid equivalent)/L, the highest concentration tested. The No-Observed-Effect Concentration (NOEC) for frond biomass was determined to be 0.35 mg A.E.(acid equivalent)/L.
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 0.35 mg/L
- EC10 or NOEC for freshwater plants:
- 0.004 mg/L
Additional information
A 14 -day toxixity test with duckweed, Lemna gibba was performed in accordance with FIFRA Guidelines 122-2 and 123-2.
Based on the analytical results generated during this study, the concentrations of the test substance (diflufenzopyr sodium salt) measured in newly prepared test solutions (days 0 and 9) closely approximated the desired nominal concentrations. Results from the 3-day-old solutions (days 3 and 12) indicated that the concentration of the test substance decreased over the 3-day period by approximately 50% from the initial measured concentrations. The decrease in test material concentrations does not appear to be related to the density of Lemna gibba but may be related to hydrolysis of the test substance in an acid medium (e.g., pH 5.0 to 6.0). Mean measured test concentrations ranged from 71 to 95% of nominal concentrations. A weak concentration-response was observed for frond density, although no adverse response was observed in frond biomass (dry weight) over the range of concentrations tested. Based on the experience of the laboratory, frond density is typically a more sensitive indicator of toxicity than frond biomass. Due to the weak response observed for frond density, the 14-day EC50 was empirically estimated to be >0.35 mg A.E (acid equivalent)./L, the highest mean measured concentration tested. The 14-day No-Observed-Effect Concentration (NOEC) for frond density was determined to be 0.0039 mg A.E. (acid equivalent)./L. Based on mean measured concentrations, the 14-day EC50 based on frond biomass was estimated to be >0.35 mg A.E.(acid equivalent)/L, the highest concentration tested. The No-Observed-Effect Concentration (NOEC) for frond biomass was determined to be 0.35 mg A.E.(acid equivalent)/L.
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