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Diss Factsheets
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EC number: 609-256-3 | CAS number: 365400-11-9
- 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
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Endpoint summary
Administrative data
Description of key information
Additional information
If the substance is released to the environment it will be transported and distributed depending on its substance specific properties (e.g. physico-chemical properties, log Koc). Based on the vapour pressure of 2.7 x 10E-9 hPa at 20 °C and the Henry´s law constant of 1.42 x 10E-9 Pa*m³/mole (20 °C, pH7) it can be concluded that volatilization of the substance in the environment is not expected. The substance is soluble in water (water solubility: 69.1 g/L at pH 7); the log Koc values are in the range of 1.28 - 2.95 (overall mean log Koc: 1.98). According to the classification system of Briggs, the adsorption Koc values would classify the substance as 'mobile', 'intermediate mobile' or 'low mobile' in soil, mostly depending on soil pH.
Hydrolysis was not considered a significant degradation pathway in the environment since limited degradation was recorded at pH5, pH 7 and pH 9 after 30 d at 25 °C. Photolysis of the substance was studied in water and soil as well as in the atmospheric compartment. In the dark test systems of the water system, the parent compound did not degrade. There were no major or minor transformation products detected. In the irradiated test systems, the parent compound decreased from 100% of the applied amount at day 0 to 99.1% of the applied at the end of irradiation. No major transformation products were detected. The minor transformation products were formed at a maximum of 2.0% of the applied amount. All of the minor transformation products were transient in nature. The total unidentified radioactivity ranged from 0 to 4.1% of the applied amount. In soil, the phototransformation DT50 of the parent substance in HCB silt loam was 90 experimental days, which is equivalent to 309 solar days in New River, AZ. The DT90 was 209 experimental days (1,027 solar days). The DT50 of the parent substance in Pikeville loamy sand was 50.6 experimental days, equivalent to 173 solar days in New River, AZ. The DT90 was 168 experimental days (576 solar days). No major degradation products were observed in either soil. Thus, in soil and water the test item was considered to be stable and photolysis is not considered to contribute significantly to the overall dissipation of the substance in the environment. A reaction with OH-radicals in the atmosphere leads to significant degradation of the substance in the atmosphere and a transport over large distances as well as accumulation is not expected. Bioaccumulation in biota and biomagnification within the food chain is not expected. The substance is characterized by a low log Pow of -1.362 at pH 7 and 23 °C indicating that the substance has a low potential for bioaccumulation.
The biodegradation of the substance was studied under aerobic and anaerobic conditions in water/sediment systems as well as in different soils. The substance was not readily degraded in the aerobic sediment/water test system. No major degradates were formed and minor degradates did not exceed 3% of the applied radioactivity. The major pathway of dissipation of the substance was adsorption to the sediment. In the case of the sandy loam sediment/water, non-extractable residues were 72.6 to 73.9 % by the end of the study, while in the silty clay loam sediment/water non-extractable residues represented 10.6 to 13.1 %of the applied radioactivity. Under aerobic conditions the substance was not readily degraded as well in sediment/water test system. No major degradates were formed. Minor degradates did not exceed 3.1% of the applied radioactivity. Less than 1% of the applied radioactivity were mineralized to 14CO2 after 132 days. The major pathway of dissipation is the formation of bound (non-extractable) residues which reached 33.8% by the end of exposure. The half-lives for the parent substance in anaerobic water and in the entire system were 75 and 227 days, respectively (159.2 and 481.9 days, recalculated to 12 °C).
Different soils with varying physico/chemical properties were tested for aerobic degradation. Single first order DT50 Degradation half-lives of the parent substance at 12 °C ranged from 11 6.5 to 72 >120 days under aerobic and anaerobic conditions, respectively. Under aerobic conditions, 22.6% of the applied radioactivity were mineralized to 14CO2 after an incubation period of 119 days. Under anaerobic conditions, 2.2 - 6.6% of the applied radioactivity were mineralized to 14CO2 after an incubation period of 120 days. However, degradation kinetics is biphasic, most probably because the soil adsorption of the substance increases with time, so that the bioavailability of the substance decreases with time. In the anaerobic study with the parent substance, there was no significant change in the soil and water levels of the major soil metabolite so that no rate constant can be calculated. In conclusion, the substance is not considered to be rapidly degraded in the environment.
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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