Sulfur Dioxide SO2

Sulfur Dioxide (SO2)
Introduction of sulfur dioxide (SO2)
Sulfur dioxide (S02), or sulphurous anhydride (sometimes called sulphur oxide) is a gas naturally released into the atmosphere by volcanic activity (volcanoes are the leading natural source). SO2 can also come from the combustion of fossil materials (coal, oil, non-desulphurised natural gas) and from some industrial processes (production of sulphuric acid, metalworking of non-ferrous metals, etc), or from residential/commercial heating. Sulfur dioxide can also present in the form of colourless gas or liquefied compressed gas with a pungent smell.

Professional use of sulfur dioxide
Sulfur dioxide is used in numerous professional applications.

– Whitening agent in the production of paper pulp, sugar and some fibres

– Anti-chlorine agent in the textile industry

– Preserving agent (antiparasitic and antiseptic) in the food industry and winemaking

– Production of sulphuric acid, sulphites, bisulphites, hydrosulphites, etc.

– Reducing agent for tannery, dyeing and sugar refinery

– Extractor for oil refining

– Cooling agent in the refrigeration industry

Risks of sulfur dioxide
Sulfur dioxide is a toxic gas when inhaled and corrosive for the skin and eyes. At high concentrations, SO2 can cause potentially fatal symptoms.

Effects on the body
Severe irritation of the mucous membranes (nose, throat) and respiratory tracts leading to cough, dyspnoea, asthma, pulmonary tightness, breathing difficulties, long-term respiratory system disorders, etc.
Accumulation of liquid in the lungs (pulmonary oedema) at high concentrations
Skin irritation and burns leading to permanent scarring or frostbite (in the case of liquefied gas); eye irritation or burns causing permanent ocular damage (including blindness)