Applications

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Sulfur Dioxide

Gas Name: 
Sulfur Dioxide
Chemical Formula: 

SO2

Synonyms: 
Sulfurous Acid Anhydride, E220

Product Uses, Sources & Applications

Sulfur dioxide is a gas which is used in a number of applications including:

  • Preservative – particularly for dried fruits
  • Anti-microbial and antioxidant in winemaking
  • Bleaching agent for paper and textiles
  • Neutralizing agent for chlorine in water and waste water facilities
  • Until the development of HFCs and CFCs, sulfur dioxide was used extensively as a refrigerant, particularly in home refrigerators

Hazards

Toxicity
Short Term (15-minute STEL*):
5
 ppm
Long-term (8-hr TWA*):
3
 ppm
*Based on OSHA regulation. Always consult local regulations directly.
Flammability
Lower Explosive Limit (LEL):
n/a
NIOSH Pocket Guide:
View pocket guide

Physical Properties

Appearance and Odor:
Colorless gas with an irritating, pungent odor
Relative Density (air = 1.0):
2.263

Recommendations

Sensor Type:
Electrochemical Diffusion Type
Standard Range:
0-10 ppm
Standard Trip Points:
3 ppm, 5 ppm
Recommended Sensor Mounting Height:
12 – 18 inches AFF.

How can Armstrong Monitoring help you?

Contact Us
Armstrong Monitoring
215 Colonnade Road South
Ottawa, Ontario, Canada
K2E 7K3
Toll Free: 
1 800 465 5777
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