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Sulphur dioxide

Sulphur dioxide, SO2, is a colourless, poisonous, toxic, corrosive, nonflammable, liquified gas with a sharp, pungent odour.

Applications
Pure sulphur dioxide is used:

  • as a component in calibration gas mixtures for environmental monitoring systems
  • and industrial hygiene gas mixtures
  • in various chemical reactions.

Materials Compatibility
Metals: Stainless Steel; Carbon Steel; Hastelloy C.
Plastics: Kel-F; PTFE; PVC.
Elastomers: Kalrez.

Technical Properties
Molecular Weight: 64.06
Specific Gravity (Air = 1): 2.3
Odour: Sharp, pungent
CAS Registry No.: 7446-09-5