Tetrabromobisphenol A is
a flame retardant made at GLCC-Central.
Manufacturers: ...Great Lakes
Chemical Corporation, One Great Lakes Boulevard, P.O. Box 2200, West Lafayette,
IN 47906, (765)497-6100; Production site: El Dorado, AR 71730
Tetrabromobisphenol A's primary use
is as a reactive flame retardant in epoxy resin circuit boards. In recent years,
tetrabromobisphenol A has also been used as a flame retardant in electronic
enclosures made of PC-ABS.
Fire-retardant additive (ABS, phenolic, unsaturated polyester resins);
fire-retardant polycarbonate comonomer
Tetrabromobisphenol-A is used
as a reactive flame retardant and as an intermediate in the production of other
flame-retardants....
[Szymanska JA et al; Toxicology 142 (2): 87-95 (2000)]**PEER REVIEWED**
Major Uses :
FLAME RETARDANT FOR PLASTICS,
PAPER, & TEXTILES
Major Uses :
2,2',6,6'-Tetrabromobisphenol
A is a reactive flame retardant; both hydroxyl groups can be reacted with
epichlorohydrin under basic conditions to form the diglycidyl ether, which is
widely used in epoxy resin formulations. 2,2',6,6'-Tetrabromobisphenol A is also
used in polycarbonate and ether polyester resins.
FLAME RETARDANT,
TETRABROMOBISPHENOL, CAUSED A SLIGHT BUT SIGNIFICANT INCR IN CYTOCHROME P450 OF
LIVER MICROSOMES.
Environmental Fate/Exposure Summary :
2,2',6,6'-Tetrabromobisphenol
A's production and use primarily as a reactive flame retardant in epoxy resin
circuit boards and recently in electronic enclosures made of PC-ABS may result
in its release to the environment through various waste streams. If released to
air, an estimated vapor pressure of 1.8X10-11 mm Hg at 25 deg C indicates
2,2',6,6'-tetrabromobisphenol A will exist solely in the particulate phase in
the ambient atmosphere. Particulate-phase 2,2',6,6'-tetrabromobisphenol A will
be removed from the atmosphere by wet and dry deposition. If released to soil,
2,2',6,6'-tetrabromobisphenol A is expected to be immobile based upon an
estimated Koc of 56,000. Volatilization from moist soil surfaces is not expected
to be an important fate process based upon an estimated Henry's Law constant of
7.0X10-11 atm-cu m/mole. 2,2',6,6'-Tetrabromobisphenol A was biodegraded in 3
different anaerobic soils with 43.7 to 57.0%, 53.4 to 65.0% and 89.5 to 90.6%
remaining after 64 days, suggesting that this compound may undergo primary
degradation under anaerobic conditions fairly quickly in some soils. Only 0.35,
0.10, and 0.03% of the initially applied radioactivity was recovered as CO2 over
this period indicating that this compound is slowly mineralized. Aerobic
biodegradation may also occur based on a sediment/water study reporting
half-lives from 48 to 84 days. Again, mineralization was much slower with less
than 8% mineralized over the 56-day study. If released into water,
2,2',6,6'-tetrabromobisphenol A is expected to adsorb to suspended solids and
sediment based upon the estimated Koc. Volatilization from water surfaces is not
expected to be an important fate process based upon this compound's estimated
Henry's Law constant. BCF values ranging from 20 to 1200 suggest that
bioconcentration in aquatic organisms is generally moderate to high.
Occupational exposure to 2,2',6,6'-tetrabromobisphenol A may occur through
inhalation of dust particles and dermal contact with this compound at workplaces
where 2,2',6,6'-tetrabromobisphenol A is produced or used. (SRC)
2,2',6,6'-Tetrabromobisphenol
A's production and use primarily as a reactive flame retardant in epoxy resin
circuit boards and recently in electronic enclosures made of PC-ABS(1) may
result in its release to the environment through various waste streams(SRC).
Analytic Laboratory Methods :
THE PROPERTIES OF BROMINATED
AROMATICS WHICH ARE USED AS FLAME RETARDANTS WERE EXAMINED BY NUCLEAR MAGNETIC
RESONANCE, MASS SPECTRA, GAS CHROMATOGRAPHY, & TLC. BROMIDIAN WAS ONE OF THE
AROMATICS EXAMINED.
Source: http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~KSZ7QF:1
GREAT LAKES
CHEMICAL CORPORATION (CHEMTURA) AND THE PATHFINDERS CAMP