Anthrone

Several unspecified isomers of anthrone were detected in chlorinated coal-tar leachate at unreported concentrations(1). A heavy-duty diesel exhaust particulate sample, NBS SRM 1650, contained anthrone at unreported concentrations(2). Diesel emission particulates, collected from a Volkswagen Rabbit contained anthrone(3). Fine particle emissions from the combined exhaust of a vented natural gas-fired residential space heater plus a water heater contained 21.4 pg/kJ anthrone(4).

The Koc of anthrone is estimated as approximately 2300(SRC), using a measured log Kow of 3.66(1) and a regression-derived equation(2,SRC). According to a recommended classification scheme(3), this estimated Koc value suggests that anthrone has only slight mobility in soil(SRC).

Superficial marine sediments of Cortiou Creek, in the sewage area of Marseilles, France, are contaminated with anthrone at concentrations ranging from non-detectable to 300 ng/g (9 of 10 sites had measurable quantities of anthrone; detection limit not given)(1).

An estimated BCF value of 360 was calculated for anthrone(SRC), using a measured log Kow of 3.66(1) and a recommended regression-derived equation(2). According to a recommended classification scheme(3), this BCF value suggests that bioconcentration in aquatic organisms will be an important fate process(SRC).

The Henry's Law constant for anthrone is estimated as 7.9X10-7 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This value indicates that anthrone will slowly volatilize from water surfaces(2,SRC). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec) is estimated as approximately 65 days(2,SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated as approximately 480 days(2,SRC). Anthrone's values for vapor pressure(3) and Henry's Law constant(1,SRC) indicate that volatilization from dry and moist soil surfaces is not likely to be a major fate process for this compound(SRC).

The rate constant for the vapor-phase reaction of anthrone with photochemically produced hydroxyl radicals has been estimated as 9.8X10-12 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1,SRC). This corresponds to an atmospheric half-life of about 40 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1,SRC).