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EC number: 200-824-2 | CAS number: 74-95-3
- 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
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- (Q)SAR
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Results are based on QSAR model
- Justification for type of information:
- QSAR prediction: migrated from IUCLID 5.6
Data source
Materials and methods
- Model:
- calculation according to Mackay, Level III
- Calculation programme:
- EPI suite V4.1
- Release year:
- 2 011
- Media:
- air - biota - sediment(s) - soil - water
Test material
- Reference substance name:
- Dibromomethane
- EC Number:
- 200-824-2
- EC Name:
- Dibromomethane
- Cas Number:
- 74-95-3
- Molecular formula:
- CH2Br2
- IUPAC Name:
- dibromomethane
Constituent 1
Study design
- Test substance input data:
- - Molar mass:173.84 gr/mol
- Data temperature:25 oC
- Water solubility:8600 mg/L
- Vapour pressure:0.0578947 atm
- log Pow:1.68
- Biomass to water partition coefficient:10.3726
-Half-Lives (hr), (based upon Biowin (Ultimate) and Aopwin):
Air: 2272
Water: 360
Soil: 720
Sediment: 3240 - Environmental properties:
- Table 1. Compartment Dimensions and Properties of the Multimedia Fate Model
Air Water Soil Sediment
Volume (m3) 1x1014 2x1011 1.8x1010 5x108
Depth (m) 1000 20 0.2 0.05
Area (m2) 1x1011 1x1010 9x1010 1x1010
Table 2. Volume Fraction and Density Default Values of the Multimedia Fate Model
Air Water Soil Sediment
Volume fraction
Aerosol 2.00E-11
Suspended 5.00E-06
particles
Fish 1.00E-06
Air 0.2
Water 0.3 0.8
Solid 0.5 0.2
Density (kg/m3)
Bulk 1.19 1000 1500 1280
Pure air 1.19
Aerosol 2000
Liquid 1000
Suspended
particles 1500
Fish 1000
Air 1.19
Water 1000 1000
Solid 2400 2400
Results and discussion
Percent distribution in media
- Air (%):
- 33.9
- Water (%):
- 35.9
- Soil (%):
- 30.1
- Sediment (%):
- 0.01
Any other information on results incl. tables
If released to air, a vapor pressure of 35.3 mm Hg at 25oC indicates dibromomethane will exist solely as a vapor in the ambient atmosphere. This tendency is predicted by Level III Fugacity Model:
|
Mass Amount (%) |
Emissions (kg/hr) |
Air |
97.3 |
1000 |
Water |
2.33 |
0 |
Soil |
0.378 |
0 |
Sediments |
0.00638 |
0 |
If released to soil, dibromomethaneis expected to have very high mobility based upon an estimated Koc of 29.86. Volatilization from moist soil surfaces is expected to be an important fate process based upon a Henry's Law constant of 8.22X10-4atm m3/mole. Dibromomethanemay volatilize from dry soil surfaces based upon its vapor pressure. This tendency is predicted by Level III Fugacity Model:
|
Mass Amount (%) |
Emissions (kg/hr) |
Air |
27.5 |
0 |
Water |
4.86 |
0 |
Soil |
67.6 |
1000 |
Sediments |
0.0133 |
0 |
If released into water, dibromomethaneis not expected to adsorb to suspended solids and sediment in water based upon the Koc and by Level III Fugacity Model. Volatilization from water surfaces is expected to be a significanttransport mechanismbased upon Henry's Law constant. Estimated volatilization half-lives for a model river and model lake are 2 hours and 6 days, respectively. On the other hand, Level III Fugacity Model predicted 84% of the substance remains in water and thus, dibromomethane can be available to biotic and abiotic degradations processes in water.
|
Mass Amount (%) |
Emissions (kg/hr) |
Air |
15.6 |
0 |
Water |
84.2 |
1000 |
Soil |
0.0605 |
0 |
Sediments |
0.231 |
0 |
If released to air soil and water dibromomethane is tending to distribute among these three compartments almost equally as predicted by Level III Fugacity Model:
|
Mass Amount (%) |
Emissions (kg/hr) |
Air |
33.9 |
1000 |
Water |
35.9 |
1000 |
Soil |
30.1 |
1000 |
Sediments |
0.0983 |
0 |
Applicant's summary and conclusion
- Conclusions:
- As predicted by Level III Fugacity Model dibromomethane is tending to distribute among water soil and air compartments almost equally. Thus, dibromomethane is expected to undergo biotic and abiotic degradations processes in each of these three compartments.
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