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EC number: 203-444-5 | CAS number: 106-93-4
- 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
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- 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

Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- not reported.
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Experimental study that is well documented, and peer-reviewed but does not specify guidelines.
Data source
Reference
- Reference Type:
- publication
- Title:
- Rate constants for the reactions of OH with ethane and some halogen substituted ethanes at 296 K.
- Author:
- Howard, C.J. & Evenson, K.M.
- Year:
- 1 976
- Bibliographic source:
- The Journal of Chemical Physics. 64(11):4303-4306.
Materials and methods
Test guideline
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- A conventional discharge-flow system was used to generate OH radicals in helium carrier gas by reaction of H and NO2. Hydroxyl radicals are detected with a laser magnetic resonace spectrometer.
- GLP compliance:
- not specified
- Remarks:
- not specified
- Type of study / information:
- Atmospheric fate of volatised substance.
Test material
- Reference substance name:
- 1,2-dibromoethane
- EC Number:
- 203-444-5
- EC Name:
- 1,2-dibromoethane
- Cas Number:
- 106-93-4
- Molecular formula:
- C2H4Br2
- IUPAC Name:
- 1,2-dibromoethane
- Details on test material:
- -Purity: >99% (analysed)
Constituent 1
Results and discussion
Any other information on results incl. tables
Figure 1 shows a series of typical OH decay plots obtained for the OH reaction with CH2BrCH2Br. The concentration of the reactant gas, [CH2BRCH2BR], is shown on the right side of the figure for each set of points and has been varied over a range of about a factor of 5 in this series of experiments. The effective bimolecular rate coefficient for each line can be obtained by dividing the first-order rate constant from the slop of the line by the average linear flow velocity v and the reactant gas concentration. An alternative way to treat the data is shown in Fig. 2, where the first-order rate constants from Fig. 1 (in s-1) are plotted as a function of the reactant concentration. An average bimolecular rate coefficient for the whole set is given by the slope of the line through the data. Since the line very nearly goes through the origin, it is clear that the same result is obtained either averaging the individual bimolecular rate coefficients or using the set of first-order costants and concentrations as in Fig. 2. This is true of nearly all of the reactions reported here.
Bromine and chlorine substitution are roughly equivalent and both tend to weaken the remaining (C-H) bonds and increase the OH reactivity.
Table 1. Rate constant summary for this work and other measurements near 296 K.
Reactant | Number of measurements | Average (s.d.) ± error (10-15cm3/molecule(s)) |
CH2BrCH2BR | 19 | 250(18) ± 55 |
Applicant's summary and conclusion
- Conclusions:
- The rate constant for ethylene dibromide is 250 ± 55 x 10^-15cm^3/molecule·s.
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