Chemical Fact Sheet

Chemical Abstract Number (CAS #) 206440
CASRN 206-44-0
Analytical Methods EPA Method 610
EPA Method 625
EPA Method 8100
EPA Method 8270
EPA Method 8310
Molecular FormulaC16H10

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Boiling Point ABOUT 375 DEG C
Melting Point 111 DEG C
Molecular Weight 202.26
Density 1.252 AT 0 DEG C/4 DEG C
Environmental Impact Fluoranthene's release into air and water is quite general since it is a universal product of combustion of organic matter and is present in fossil fuel products. Its release is greatest in areas of high anthropogenic activity. Both in air and water it is largely associated with particulate matter. When released into water, it will rapidly become adsorbed to sediment and particulate matter in the water column, and bioconcentrate into aquatic organisms. In fact, concentrations in shellfish such as clams and mussels are an excellent indicator of pollution in a localized area. In the unadsorbed state it will degrade by photolysis (half-life days to wk). It appears to be stable in sediment for decades or more. Because it is strongly adsorbed to soil, it should remain in the upper few centimeters of the soil. However, its detection in groundwater demonstrates that it can be transported there by some process(es). It should biodegrade in a few years in the presence of acclimated microorganisms. The fluoranthene released in the atmosphere will photodegrade in the free state (half-life 4-5 days). Aerosols and particulate matter containing sorbed fluoranthene is sufficiently stable to be transported long distances while being subject to gravitational settling and rainout. Photochemical smog situations enhance the degradation of both the sorbed molecule and the free vapor. Human exposure is from ambient air and ingesting food contaminated with products of combustion or prepared in such a manner (smoking, charcoal broiling) as to generate polynuclear aromatic hydrocarbons. Exposure from drinking water is less common since water treatment such as filtration and chlorination removes fluoranthene. Distribution systems lined with coal tar or asphalt can sometimes contribute measurable amounts of fluoranthene to the drinking water.
Environmental Fate TERRESTRIAL FATE: Fluoranthene adsorbs strongly to soil and would be expected to remain in the upper layers of soil. However, it has been detected in groundwater samples which demonstrates that it can be transported there by some process(es). It slowly degrades in soil (half-life ca 5 mo to 2 yr). AQUATIC FATE: When fluoranthene is released into water it will partially sorb to sediment and particulate matter in the water column including phytoplankton, zooplankton and detrital particles . Photolysis should occur in the surface layers of water (half-life 21 hr in clear water, ca 200 hr in turbid water). When a crude oil dispersion was placed in the top of a water column in a controlled ecosystem in Saanich Inlet, Canada, the fluoranthene concn in the water column decreased exponentially, declining to half its initial concentration in 3-4 days. After 17 days, 10% of the fluoranthene was recovered in the sediment . In another study, fluoranthene concns in sediment core samples in an area near a ferro-smelter in Norway were approximately constant down to a depth of 6-8 cm below which it sharply declined . The depth of sediment can be correlated with the year it was desposited and a depth of 6-8 cm correspond to 1923 when when the smelter was installed . This suggests that little or no degradation occurred in the sediment. ATMOSPHERIC FATE: Fluoranthene released into the atmosphere exists as the free vapor as well as adsorbed to particulate matter. The unadsorbed chemical will photolyze as well as react with such molecules as ozone, nitrogen oxides and sulfur oxides. The half-life is approximately 4-5 days. The sorbed molecule is considerably more stable, traveling long distances under appropriate wind conditions. It will be subject to gravitational settling and rainout. The sorbed chemical, however, appears to degrade at about the same rate as the free chemical under photochemical smog conditions.
Drinking Water Impact DRINKING WATER: Ottawa drinking water (Jan-Feb 1978) 0.55 and 1.9 ng/l . 18 USA cities - (finished water) not detected in 11 cities (detection limit 0.1-0 ng/l), 1-8.9 ng/l in 7 cities, 94.5 ng/l in Wheeling WV . Derwent England finished water 0.8 ng/l . Filtration, activated carbon treatment and chlorination remove considerable amounts of fluoranthene from drinking water. However distribution systems with asphalt or coal tar linings can contribute fluoranthene to the tap water. In one extreme case, Portland Oregon, the raw water had 4 ng/l and the distributed water 640 ng/l fluoranthene . Nordic tap water <0.58-24 ng/l . Detected at >0.1 ug/l in finished water from 5 of 10 utilities in Ohio River Basin . GROUND WATER: Concn as high as 10 ug/l have been detected in contaminated ground water in the Netherlands . Groundwater in Germany 26.2-169.0 ng/l . Detected in raw water from ground water supply in Ohio River Basin . Detected in 1 of 4 wells sampled in November down gradient from spray irrigation field treating wastewater from wood preserving plant using creosote; these samples in July showed no PAH . SURFACE WATER: Detected in 8 of 10 sites on Ohio River and tributaries and the raw water of 7 of 9 utilities using surface water sources in the Ohio River Basin . River water

DISCLAIMER - Please Read

Florida-Spectrum List of Services
Florida-Spectrum Homepage