There are some physical and chemical properties of hydrogen sulfide
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Physical Properties of Hydrogen Sulfide
Molecular Weight
34.08
Boiling Point
-60.4 oC
Melting Point
-85.5 oC
Density/Specific Gravity
1.539 g/L at 0 oC (water = 1)
Vapor Pressure
20 atm at 25.5 oC
Vapor Density
1.189 (air = 1)
Autoignition Temperature
260 oC
Conversion Factor
1 ppm = 1.39 mg/m3
(Merck, 1989; Sax, 1989)
SOURCES AND EMISSIONS
A. Sources
Hydrogen sulfide is emitted during the burning of sulfur-containing fuel oil and coal and wherever organic matter undergoes putrefaction. It is also emitted from industrial paper plants using the kraft process. It may also be generated by the leather industry, which uses sodium sulfide to remove hair from hides prior to tanning. Large quantities are used in the production of heavy water for nuclear reactors. It is also used in the manufacture of chemicals, in metallurgy, and as an analytical reagent (Amdur et al., 1980; Sax, 1987).
The primary stationary sources that have reported emissions of hydrogen sulfide in California are electrical service companies, oil and gas extraction operations, and steam and air conditioning supply services (ARB, 1997b).
B. Emissions
The total emissions of hydrogen sulfide from stationary sources in California are estimated to be at least 5.6 million pounds per year, based on data reported under the Air Toxics "Hot Spots" Program (AB 2588) (ARB, 1997b).
C. Natural Occurrence
Hydrogen sulfide occurs in coal pits, volcanic gases, natural gas wells, sulfur springs, and in decaying organic matter containing sulfur (Merck, 1989).
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physical properties-
colorless
Molecular Weight (lb/mol) 34.08
Boiling Point (°F) -74.9
Melting Point (°F) -122.0
chemical properties-
soluble in water, alcohol,ether and glycerol.
the gas can corrode metals
burns in air with a pale blue flame.
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