Sulfur Dioxide (SO2) is a colorless gas of a distinctive, strong odor. It is obtained from either pyrite or sulfur by burning. It is toxic and a strong irritant and is classified as one of the major air pollutants. It is widely used in the production of sulfur-containing chemicals, in the paper industry and in metal refining. It is also used as a solvent, as a food additive and as a reaction medium.
|Molecular weight: 64.06||Critical temperature:430.8 K|
|Melting point: 198.7 K||Critical pressure:7.884 MPa|
|Boiling point:263.0 K||Critical density:525 kg/m3|
|Normal vapor density:2.86 kg/m3||(@0°C, 101.3 kPa)|
Heat & Mass Transfer, and Fluids Engineering