Benzene's
Chemical Formula
Benzene contains 92.3% carbon
and 7.7% hydrogen with the chemical formula C6H6. The benzene
molecule is represented by a hexagon formed by the six sets of
carbon and hydrogen atoms bonded together with alternating single
and double bonds. The benzene molecule is the cornerstone for
aromatic compounds, most of which contain one or more benzene
rings.
Benzene is nonpolar, meaning it
carries no major area of change in any portion of the molecule
and no net electrical charge considering the molecule as a whole.
Benzene is relatively soluble in water and is capable of mixing
with polar solvents without separating into two phases. Some polar
solvents include:
Chloroform
Acetone
Alcohol
Carbon Tetrachloride
Benzene is a highly stable aromatic
hydrocarbon, but it does react with other compounds primarily
with the substitution of a hydrogen atom. Some reactions occur
that could rupture the molecule.
Chemical and Physical Properties
of Benzene:
Molecular Weight 78.11 g/mole
Melting Point 5.5 degrees Celsius
Boiling Point 80.1 degrees Celsius
Density at 20 degrees Celsius 0.879 g/ml
Vapor Pressure at 25 degrees Celsius 0.13 atm.
Flash Point (closed cup) -11.1 degrees Celsius
Solubility in Water at 25 degrees Celsius 1.8 g/L
Conversions at 25 degrees Celsius 1 ppm = 3.25 mg/m3
1 mg/liter = 313 ppm
(EPA 1998) http://www.epa.gov/otaq/regs/toxics/airtox1b.pdf
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