Sulfur dioxide (SO₂) is a colorless gas with a characteristic, irritating, pungent odor. Exposure to sulfur dioxide may cause irritation to the eyes, nose, and throat. Symptoms include: nasal mucus, choking, cough, and reflex bronchi constriction, and when liquid: frostbite Workers may be harmed from exposure to sulfur dioxide. The level of exposure depends upon the dose, duration, and work being done. Sulfur dioxide is used in many industries. In the food industries, as a food preservative. It acts as a bleaching agent to remove the excess chlorine and as a disinfectant. In cold storage plant, it acts as a refrigerant. It is used as a reagent and a solvent in the laboratory. Ankur Gases provide Sulphur Dioxide Gas for your usages.