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Diss Factsheets
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EC number: 605-140-1 | CAS number: 158237-07-1
- 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)
Description of key information
Key value for chemical safety assessment
Additional information
Data on the phototransformation in air is not a standard requirement under Regulation (EC) No. 1907/2006 Annexes VII - X. However, calculations on the chemical lifetime of the test substance in the troposhere were conducted and are provided in the dossier in order to present available data and to further add information on the potential photodegradation of the substance in air.
A report calculating the chemical lifetime of the test substance in the troposphere is available (1998). Since according to the guideline "Federal Biological Institute for Agriculture and Forestry (BBA), Germany: Guidelines for the Testing of Plant Protection Products in Registration Procedure, Part IV, 6-1 (July 1990) entitled: Determination of the volatilisation and the fate of plant protectants in the air" the test substance was not degraded by 50% within 4 days after application either by hydrolysis or by direct photolysis in aqueous solution, the lifetime of the test substance in air was assessed based on the calculation according to Atkinson by AOPWIN (version 1.87).
The calculated overall OH reaction rate of 28.72 x 10^-12 [cm3/molecules sec] is mainly obtained by several hydrogen abstractions at various sites (kH-abstotal= 23.10 x 10^-12 [cm3/molecules sec]). Furthermore, contributions were assumed by reactions at two nitrogen sites (kN total= 2.00 x 10^-12 [cm3/molecules sec]) and by additions to the aromatic ring (kar= 3.62 x 10^-12 [cm /molecules sec]).
Based on the before-mentioned calculated overall OH-rate constant a half-life of the test substance in air of 4.4 hours corresponding to a chemical lifetime in air of 6.4 hours is assessed using a 12-hrs-day with 1.5 x 10^6 OH-radicals/cm3.
The before-mentioned estimations do not consider any contribution of an attack by other radicals (i.e. by nitrate radicals). If exposition occurs during the early afternoon, as opposite to the early morning or to the late afternoon, it is to be expected that the chemical lifetime will be shorter at that moment, as during the day the OH-radical concentration may increase unto 5 x 10^6 radicals/cm3 in the troposphere. On the other hand the OH-radical concentration in the night decreases to zero. A more conservative assessment of the overall OH-radical rate constant (e.g. not considering the assumed contributions in the modelling) would result in a maximum chemical lifetime of the test substance of about 8 hours in the air.
The chemical stability of the test substance in air is not determined by an attack of OH-radicals at one single site, but at different parts of the molecule. This should result in the formation of various primary radicals leading to secondary oxidation products, which can be eliminated from the air by wet and/or dry deposition. On account of the relatively short chemical lifetime of the test substance in the air it is to be expected that it can neither be transported in gaseous phase over large distances nor accumulate in the atmospheric compartment.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.