2,2-bis (4-hydroxyphenyl) propane

80-05-7

228.28

The value of Henry's Law constant suggests that volatilization
would be insignificant from all bofies of water. 
Due to its
relatively low vapor pressure and its to adsorb to soil,
bisphenol A is not expected to volatilize significantly from
wet or dry soil surfaces (Lyman et al. 1982) (Howard 1989).

Soil adsorption coefficients (Koc) of 314 and 1524 have been
estimated for bisphenol A based on the water solubility and the
log Kow, respectively (Lyman et al. 1982).

The Koc values suggest that mobility of bisphenol A in soil
would be moderate to low and that adsorption to suspended
solids would be moderate to extensive (Swann et al. 1983).

Based on the estimated vapor pressure bisphenol A is expected
to exist almost entirely in the particulate phase in the
atmosphere. 
Bisphenol A particles may be removed from the
atmosphere by dry deposition or photolysis. 
The small fraction
of bisphenol A which exist in the vapor phase may react with
photochemically generated hydroxyl radicals (half-life 4 hours)
or it may photolyze. 
Photodegradation products of bisphenol A
vapor are phenol, 4-isopropylphenol and a semiquinone derivate
of bisphenol A (Howard 1989).

Photooxidation half-life:
160d - 2.75d, scientific judgement based upon reported reaction
rate constants for .OH and RO2. 
(low t1/2) and RO2. 
(high t1/2)
with the phenol glass (Howard 1991).

The half-life for bisphenol A vapor reacting with
photochemically generated hydroxyl radicals in the atmosphere
has been estimated to be 4 hours based on a reaction rate
constant of 6.0x10-11 cm3/mol-sec at 25°C and an average
hydroxyl radical concentration of 8.0x10+5 mol/cm3. 
However
bisphenol A is expected to exist almost entirely in the
particulate phase in the atmosphere and reaction with hydroxyl
radicals is expected to be much slower in particulate form than
in vapor form (GEMS 1987) (Howard 1989).

In neutral and acidic methanol solutions bisphenol A exhibits
slight adsorption of UV light wavelenghts >290 nm, while in
basic methanol solution bisphenol A exhibits significant
adsorption of UV >290 nm. 
These data indicate that bisphenol A
has potential to photolyze in water, and that this potential is
somewhat greater under basic conditions (Sadtler 1966).

Aerobic half-life: 
6mo - 1d, scientific judgement based upon screening test data 
which indicate either rabid degradation or resistance to or 
slow degradation (Howard 1991).

Anaerobic half-life:
24mo - 4d, scientific judgement based estimated unacclimated 
aerobic aqueous biodegradation half-life (howard 1991).

Biodegradation:
0% by BOD
period: 14d
substace: 100 mg/l
sludge: 30 mg/l
(MITI 1992)

Half-life of 3 mg/l bisphenol A in natural recieving water:
bisphenol A plant discharge, 3 days (Dorn et al. 1987).

OECD biodegradation screening test, domestic sewage as seed <1%
degradation in 28 days (Dorn et al. 1987).

Confirmed to be non-biodegradable (Anon. 1987).

Confirmed to be non-accumulative or low accumulative (Anon.
1987).

A bioconcentration factor of <100 was measured for bisphenol A 
in carp (Kawasaki 1980).

BCF of 42 and 196 were estimated for bisphenol A based on water 
solubility and log Kow, respectively. 
These BCF values indicate 
that bisphenol A should not bioaccumulate significantly in 
aquatic organisms (Lyman et al. 1982).