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EC number: 214-787-5 | CAS number: 1194-65-6
- 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 soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in soil
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21 June 1988 to 08 February 1990
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EPA Guideline Subdivision N 161-3 (Photodegradation Studies on Soil)
- Deviations:
- no
- GLP compliance:
- yes
- Radiolabelling:
- yes
- Analytical monitoring:
- yes
- Analytical method:
- high-performance liquid chromatography
- Light source:
- Xenon lamp
- Light spectrum: wavelength in nm:
- > 290
- Duration:
- 30 d
- Temp.:
- 25 °C
- Initial conc. measured:
- 2 other: µg/cm2 soil
- Key result
- DT50:
- 50.4 d
- Test condition:
- Based on volatilisation in irradiated test system
- Key result
- DT50:
- 4.7 d
- Test condition:
- Based on volatilisation in dark test system
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not specified
- Conclusions:
- Under the conditions of the test, half-lifes of the test material were determined to be 50.4 days (irradiated test system) and 4.7 days (dark test system). The test material is volatile enough so that volatilisation accounts of most of the disappearance from the soil surface. Photodegradation was not detected and the loss of the test material from the soil surface can be attributed almost entirely to volatilisation of the test material.
- Executive summary:
In a GLP compliant photolysis study conducted in accordance with standardised guideline EPA Guideline 161-3, the photodegradation of the test material at the soil surface was determined. Under the conditions of the test, half-lifes of the test material were determined to be 50.4 days (irradiated test system) and 4.7 days (dark test system). The test material is volatile enough so that volatilisation accounts of most of the disappearance from the soil surface. Photodegradation was not detected and the loss of the test material from the soil surface can be attributed almost entirely to volatilisation of the test material.
Reference
The study samples showed an exponential decrease in parent from the soil with increasing time. This decrease in parent compound from the study soil was attributed to volatilisation and not to photodegradation. Rate constants were determined as:
Irradiated test system: 0.0138 days-1
Dark test system: 0.146 days-1
While no specific studies were conducted to evaluate the difference in the volatility observed between the dark and the irradiated systems, it may be due to condensation of volatilised test material coming in contact with the cooled inner surface of the exposed test chamber. In order to maintain the soil surface temperature within an acceptable range it is necessary to cool the interior surface by circulating cooling water around the inner wall of the test chamber. The volatilisation rate of any compound coming in contact with this cooled surface could be expected to be less than that observed for another system without water cooling.
The mean mass accountability ranged from 100-84 % with a mean % recovery of 92.4 % for the exposed system. The loss of activity was attributed to volatile components in the test system. The result is not entirely unexpected due to the volatile nature of the test material. Results of the two additional day-30 exposed samples gave mass balances of less than 60 % for each sample point, further indicating the volatile nature of the test material and the inability to effectively trap the compound. All efforts to minimise the losses were ineffective in maintaining the mass balance of the day-30 samples above 84.3 %. The overall mass balance for all sample points, however, was above 92 %.
Description of key information
The DT50 value of the test material was determined to be 50.4 days (irridated test system) and 4.7 days (dark test system) according to a study performed in line with EPA 161-3.
Key value for chemical safety assessment
Additional information
See 'Environmental Fate and Pathways' endpoint summary.
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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