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Sulphur Dioxide

Sulphur Dioxide (SO2)

Sulfur dioxide, (SO2) is an inorganic compound which has a pungent, irritating odour and is a heavy, colourless, poisonous gas. It is produced in huge quantities in intermediate steps of sulfuric acid manufacture.


  • Disinfectant
  • Refrigerant
  • Reducing agent
  • Bleach
  • Food preservative
  • Fumigant
  • Glass industry
  • Bulb industry
  • Bleaching wool or straw
  • Preparation of:
    • Sulphuric acid
    • Sulphur trioxide
    • Sulphites
Material Safety Data Sheet

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Is sulphur dioxide harmful to humans?

Exposure to Sulphur Dioxide may cause irritation to eyes, nose and throat.

What is sulphur dioxide used for?

Sulfur dioxide is used primarily as a preservative and sterilizing agent for dried fruits, some juices, and wine. It is also used in chemical manufacturing and as a bleaching agent for paper pulp. It is used in water treatment, as a fungicide and in the production of other chemicals. Sulfur dioxide is also used as a refrigerant and in fire suppression systems.

What is bad about sulphur dioxide?

The affect of sulphur dioxide on the respiratory system, particularly on the lung system is quite harmful.

Is sulfur dioxide safe in food?

Sulphur dioxide is widely used in the food industry for its preservation and antioxidant proeprties. therefore is considered to be harmless in this sector.

How do you remove sulfur dioxide from food?

Since sulphur dixode is water soluble, leaving the food item in warm water for a couple of minutes can be helpful to remove sulphur dioxide.

Is sulfur dioxide toxic or poisonous?

Exposure to Sulphur Dioxide over 100ppm can be considered to be very dangerous.

Is sulphur dioxide good for us?

Sulphur dioxide is not considered good for human health. It is an air pollutant and at high concentrations can cause respiratory problems and other health issues. It's mainly used as a preservative for some processed food. People with sulfite sensitivity can have allergic-like reactions to it.

What are 3 common sources that give off sulfur dioxide?

"Three common sources that give off sulfur dioxide are:

  1. Burning of fossil fuels like coal, oil and natural gas in industries, power plants.
  2. Volcanoes
  3. Metal smelting and processing industry."

Why is sulphur used in drugs?

Sulphur is used for the treatment of acne, it acts as a keratolytic agent and also kills bacteria.

How much sulfur dioxide is toxic?

Exposure to sulphur dioxide could be life threatening, even 100ppm sulphur di oxide is very dangerous.

Does sulphur dioxide affect the brain?

Sulphur in excess can cause brain cell death, and can lead to brain damage.

How does sulphur affect the human body?

Sulphur is low in toxicity to humans,however indigestion of too much sulphur can cause stomach ache and diarrhea.

Who is most at risk for sulfur dioxide?

People with respiratory conditions, such as asthma and chronic obstructive pulmonary disease (COPD) are most at risk for the health effects caused by sulfur dioxide. Long-term exposure to high levels of sulfur dioxide can lead to chronic respiratory problems, and can exacerbate existing respiratory conditions.

Which foods contain sulphur dioxide?

Sulphur dioxide is used as a preservatives so it is most likely to be found in dry fruits, pickles, sausages.

Is coffee high in sulfur?

Sulfur is present in many foods and beverages, including coffee. However, it is not considered to be a major component of coffee and is found in trace amounts.