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Diss Factsheets
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EC number: 201-236-9 | CAS number: 79-94-7
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_environmental-fate-and-pathways.png)
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Study period:
- 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Derived using calculation method software recommended by REACH Guidance (e.g. EPIwin).
Data source
Reference
- Reference Type:
- other: Estimation software
- Title:
- Unnamed
- Year:
- 2 007
Materials and methods
- Model:
- calculation according to Mackay, Level III
- Calculation programme:
- EPI Suite v3.20; modeling based on chemical structure
- Release year:
- 2 007
- Media:
- other: air, water, soil, sediment
Test material
Constituent 1
Results and discussion
Percent distribution in media
- Air (%):
- 0
- Water (%):
- 0.632
- Soil (%):
- 53.2
- Sediment (%):
- 46.2
- Aerosol (%):
- 0
Any other information on results incl. tables
TBBPA's transport and distribution between environmental compartments was modeled using EPI v3.20, and based on the chemical's structure. Over 99% of TBBPA released to the environment is predicted to partition to soil (53%) and sediment (46%). Negligible amounts are predicted to partion to water (0.6%) and air (0.00008%) (Level III Fugacity Model; Emissions of 1000 kg/hr to each of air, water and soil). In soil and sediment, TBBPA is expected to bind extensively to organic carbon (estimated Koc soil = 6.5 x 10E6). Movement into groundwater is not expected based on this Koc and measured water solubility. TBBPA is expected to partition from water to organic carbon (Koc = 5.6 x 10E5). TBBPA is not expected to volatilize from water (Volatilization half-life in rivers = 6.7 x 10E5, in lakes = 7.3 x 10E6). In air, TBBPA is expected to be be bound to particulates; the fraction sorbed to particulates is estimated to be 1 at 25 degrees C (AEROWIN v1.00). Its movement in the atmosphere will be goverened by the particles to which it is bound. Sewage treatment plants are predicted to remove TBBPA from the influent to a high degree (94%), but biodegradation in the treatment plant is not expected. Removal in the treatment plant will be by partitioning to sludge. Leaching from polymers is not expected, in part because its primary use is as a reactive flame retardant in printed circuit boards but also due to its physical/chemical properties.
Distribution modelling results are summarised in the following table. EPI v3.20 was used because later versions of this software included incorrect values in its reference library for certain brominated flame retardants.
Estimated properties for TBBPA using EPI (v3.20).
Property |
Result |
EPI Module |
Henry’s Law Constant (25°C) |
2.31 x 10E-13 atm-m3/mole |
HENRY v3.10 |
|
9.43 x 10E-12 unitless |
HENRYWIN v3.10 |
|
2.47 x 10E-8 atm-m3-mole |
VP/Wsol Estimate using EPI values |
Liquid/Subcooled Vapor Pressure |
1.95 x 10E-7 Pa |
AEROWIN v1.00 |
Koa (octanol/air partition coefficient |
1.678 x 10E18 |
KOAWIN v1.10 |
Log Kaw (air/water partition coefficient) |
18.22 |
KOAWin v1.10 |
Particle/gas Partition Coefficient (Kp) (m3/ug) |
15.4 (Mackay model) 4.12 x 10E5 (Koa model) |
AEROWIN v1.00 |
Reaction with Hydroxyl Radicals in the Atmosphere |
Overall OH Rate Constant = 2.9584 x 10E-12 cm3/molecule-sec; Half-life = 3.615 days (12-hr day; 1.56 x 10E6 OH/cm3) |
AOP v1.92 |
Koc |
5.62 x 10E5 |
PCKOC v1.66 |
Koc-soil |
6.5 x 10E6 |
Level III Fugacity Model |
Biomass to water partition coefficient |
3.169 x 10E6 |
STP Fugacity Model |
Sorption to airborne particulates (25°C) |
1 |
Octanol/Air Model |
|
0.998 |
Junge-Pankow Model |
|
0.99 |
Mackay Model |
Environmental Partitioning |
At Emissions to Air, Water, Soil and Sediment of 1000, 1000, 1000 and 0 kg/hr, respectively:
Distribution (%): Air 8.93 x 10E-5; Water 0.632; Soil 53.2; Sediment 46.2
Fugactity (atm): Air 4.24 x 10E-7; Water 5.17 x 10E-20; Soil 3.58 x 10E-21; Sediment 1.4 x 10E-19
Reaction (kg/hr): Air 0.317; Water 45.1; Soil 1.9 x 10E-3; Sediment 366
Advection (kg/hr): Air 0.397; Water 281; Soil 0; Sediment 410
Reaction (%): Air 0.01; Water 1.5; Soil 63.2; Sediment 12.2
Advection (%): Air 0.01; Water 9.37; Soil 0, Sediment 13.7 |
Level III Fugacity Model |
Applicant's summary and conclusion
- Conclusions:
- In the environment, TBBPA is expected to partition mainly to sediment and soil, where it will be bound to particulate matter. Partioning to air and water will be negligble, and that present in these matrixes will also be bound to particulate matter. TBBPA's movement in the atmosphere will be associated with that of the particulates to which it is bound.
- Executive summary:
In the environment, TBBPA is expected to partition mainly to sediment and soil, where it will be bound to particulate matter. Partioning to air and water will be negligble, and that present in these matrixes will also be bound to particulate matter. TBBPA's movement in the atmosphere will be associated with that of the particulates to which it is bound.
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.
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