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Diss Factsheets
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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
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation in water: screening tests
There are several higher tier biodegradation studies available assessing the biodegradation of the test substance in water and sediment, and in soil showing a moderately fast degradation/dissipation. However, in the light of the principle of precaution and the worst case the substance is thus regarded to be not readily biodegradable.
Biodegradation in water and sediment: simulation tests
The anaerobic aquatic metabolism of 14C-labelled test substance (diflufenzopyr) was studied in sediment and pond water. During the study the primary metabolite (difluoroaniline metabolite) reached a maximum concentration of 22% TAR (total applied radioactivity) by day 61 and decreased to 1% TAR by 187 DAT. The DT50 of the metabolite difluoroaniline was 27.4 days. The intermediate metabolite BH 654-5 ranged from 0.6% to 8% TAR and at 187 DAT accounted for less than 1% TAR. The present study showed that the test substance is rapidly degraded under anarobic conditions. The DT50 of the test substance was reported to be about 7.5 days. The half-lives in water and sediment were determined to be 5.75 d at 25 °C and 7.87 d at 25 °C, respectively.
Biodegradation in soil
The test substance (diflufenzopyr) degraded with a moderate rate under aerobic conditions with a half-life of about 18 days. The test substance degraded to a number of products. Metabolites M1 (8-Methyl-5-hydroxy-pyrido(2,3 d)-pyridazinone), M9 (8-Methylpyrido(2,3-d)pyridazine-2,5(1H,6H)-dione) and CO2 were the only degradation products found in excess of 10% TAR (total applied radiation) during the course of the study.
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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