Iron, brass, copper, and some forms of plastic and rubber. Most peopleĬan detect sulfur dioxide at levels of 1 to 3 ppm (1 ppm isįlammability: nonflammable Incompatibilities Is usually adequate to warn of acute exposure. Room temperature, colorless liquid when pressurized or cooled. Irreversible or other serious health effects or symptoms thatĬould impair their abilities to take protective action) = = 5 ppm (averaged over an 8-hour workshift)ĪIHA ERPG-2 (maximum airborne concentrationīelow which it is believed that nearly all persons could beĮxposed for up to 1 hour without experiencing or developing Toxic amounts of sulfur dioxide can be released from the preservativeĬhemical metabisulfite in the presence of water and acid. In metal and ore refining (6%) and in oil refining (4%). To bleach wood pulp and paper (20%) to process, disinfect,Īnd bleach food (16%) for waste and water treatment (10%) Hydrosulfites and other sulfur-containing chemicals (40%) It is sometimes added asĪ warning marker and fire retardant to liquid grain fumigants.Īpproximately 300,000 tons are used each year to manufacture Protection Agency (EPA) priority air pollutant, but has many Sources), the smelting of sulfide ores, volcanic emissions,Īnd several other natural sources. Sources/Usesįrom the combustion of fossil fuels (75% to 85% of the industrial Sensitive asthmatic individuals can develop bronchospasm afterĮating foods or drinking wine preserved with sulfur dioxide Used in small amounts as a food and wine preservative.

No data were located regardingīecause it is a gas at room temperature. Gas or liquid sulfur dioxide can produce severe corneal damageĪnd frostbite injury to the skin. Skin/Eye ContactĮxposures of 10 to 20 ppm cause irritation May be exposed to higher levels than adults in the same locationīecause of their short stature and the higher levels of sulfurĭioxide found nearer to the ground and because they are slow They have greater lung surface area:body weight ratios and Of sulfur dioxide as adults may receive a larger dose because Or low-lying areas can result in asphyxiation. Heavier than air thus, exposure in poorly ventilated, enclosed, Exposures of 50 to 100 ppm may be toleratedįor more than 30 to 60 minutes, but higher or longer exposuresĬan cause death from airway obstruction. Respiratory protection is required for exposuresĪt or above 20 ppm. Healthy adults experience increased airway resistanceĪt 5 ppm, sneezing and coughing at 10 ppm, and bronchospasmĪt 20 ppm. With sulfur dioxide concentrations of less than 0.1 ppm whenĮxercising. People with asthma can experience increased airway resistance Reacts with the moisture of mucous membranes to form sulfurousĪcid (H 2SO 3), which is a severe irritant.

Most exposures are due to air pollution,Īnd this has both short-term and chronic health consequencesįor people with lung disease. Inhalation is the major route of exposure Although sulfur dioxide does not burn in air, cylinders of compressed liquid can explode in the heat of a fire. It is handled and transported as a liquefied compressed gas. Most people can smell sulfur dioxide at levels of 0.3 to 1 ppm. Ingestion, although insignificant, is possible.Īt room temperature, sulfur dioxide is a nonflammable, colorless gas with a very strong, pungent odor. Sulfur dioxide is present in some foods therefore, oral Tract no data were located regarding dermal absorption. Sulfur dioxide is readily absorbed through the upper respiratory.Odor and irritating properties usually provide adequate At room temperature, sulfur dioxide is a nonflammable,Ĭolorless gas that is heavier than air.

Is contaminated with liquid sulfur dioxide can secondarilyĬontaminate rescuers by direct contact or through off-gassing Persons exposed only to sulfur dioxide gas pose no risk.Synonyms include sulfur oxide, sulfurous acid anhydride, sulfurous anhydride, and sulfurous oxide. Medical Management Guidelines for Sulfur Dioxide

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