Sulfur dioxide (SO2)

Sulfur dioxide (SO2) is available in a liquefied form, under pressure.

Unlike other manufacturers who produce SO2 using a sulfur burner, INEOS Calabrian's proprietary production process generates ultra-pure on-purpose sulfur dioxide by the reaction of pure oxygen with sulfur. This unique closed-loop design supports a more efficient and environmentally friendly production process. 

Both sites offer rail car and truckload deliveries.


  1. Cyanide destruction and leaching in the mining industry (Manganese, Gold, Cobalt, Iodine, Nickel and Silver)
  2. Iodine manufacturing
  3. Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants
  4. Oxygen scavenger
  5. Preservative
  6. Reducing agent
  7. Sanitizer
  8. Used in production of cleaning agents, detergents, and surfactant production
  9. Lithium battery recycling
  10. Intermediate to sulfur trioxide (SO3), oleum and sulfuric acid (H2SO4)

Chemical Composition

Sulfur dioxide, wt% 99.9 min
Non-volatiles, ppm 50 max
H2SO4, ppm 25 max
Moisture, ppm 100 max

Physical Properties

Boiling point 14°F
Critical temperature 314.8°F
Critical pressure 77.7 atm.
Specific gravity of liquid at 32°F (water = 1) 1.43
Gas at 32°F and 1 atmosphere (air = 1) 2.26
Density of gas at 32°F and 1 atmosphere 2.92 kg/m3
Viscosity of liquid at 32°F 0.39 centipoise

Product meets FCC specifications, is Kosher and NSF certified.


Shipped in insulated railcars and tank trucks as a liquid under pressure.

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