👉 Subsulfide is a gas that is formed when sulfur dioxide (SO2) reacts with oxygen in the air. It is a byproduct of combustion and can have harmful effects on humans if inhalation or contact occurs. Subsulfide is commonly used as a refrigerant in many industrial applications, but it must be stored properly to prevent its release into the atmosphere. In general, subsulfide refers to the gas that is formed when sulfur dioxide reacts with oxygen in the air. It