Sulfur Dioxide (SO₂)
CAS Number:
7446-09-5
Sulfur dioxide (SO₂) is a colorless gas with a sharp, choking odor produced by the combustion of sulfur-containing fuels, smelting of sulfide ores, paper and pulp manufacturing, and refrigeration systems that use SO₂ as a refrigerant. It is a potent respiratory irritant that causes bronchoconstriction, coughing, and chest tightness, with asthmatics being particularly sensitive. Higher concentrations can cause severe airway damage and pulmonary edema. Workers in petroleum refining, sulfuric acid production, food preservation, wastewater treatment, and volcanic or geothermal environments face significant SO₂ exposure risk.
Sulfur dioxide (SO₂) monitoring helps detect this corrosive, irritating gas so teams can respond quickly to leaks or process upsets before exposures become a problem. RAECO Rents gas monitors are bump tested or span calibrated on the day of shipment. Our team can help confirm the right monitor, alarms, and setup for the job, with fast turnaround and phone support so you can get reliable field readings quickly.
