What is sulfur dioxide?

  • (noun): A colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain.
    Synonyms: sulphur dioxide

Sulfur Dioxide

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. It is a toxic gas with a pungent, irritating smell, that is released by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide unless the sulfur compounds are removed before burning the fuel. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain. Sulfur dioxide emissions are also a precursor to particulates in the atmosphere. Both of these impacts are cause for concern over the environmental impact of these fuels.

Read more about Sulfur Dioxide.

Some articles on sulfur dioxide:

Sulfur Dioxide - Safety - Ingestion
... United States, the Center for Science in the Public Interest lists the two food preservatives, sulfur dioxide and sodium bisulfite, as being safe for human consumption except for certain individuals who may be ...
La Oroya - Pollution
... a cost of US$57 million that will reduce gas volume and provide a much richer sulfur dioxide off gas that is far more suitable for sulfuric acid production ... Despite advancements in other areas, sulfur dioxide emissions reached record levels in August 2008 ... This will reduce sulfur dioxide emissions significantly ...
Sulfinic Acid
... Sulfinic acids are oxoacids of sulfur with the structure RSO(OH) ... In these organosulfur compounds, sulfur is pyramidal ... An alternative route is the reaction of Grignard reagents with sulfur dioxide ...
Air Pollution Index - Hong Kong
... based on the level of 6 atmospheric pollutants, namely sulfur dioxide (SO2), nitrogen dioxide (NO2), respirable suspended particulates, carbon monoxide (CO ... There are hourly, 24 hour and annual targets for sulfur dioxide and nitrogen dioxide, and 24 hour and annual targets for particulates ... revised its air quality guideline levels of sulfur dioxide, nitrogen dioxide and ozone in 2006 in light of new scientific evidence ...
Acid Rain Retirement Fund - Accomplishments To Date
2011 owns the right to emit 211 tons of sulfur dioxide per year, plus whatever amount it has not emitted in previous years ... in 2011 holds the legal right to emit a total of 1,120 tons (2,240,000 pounds) of sulfur dioxide in 2011 ... other than releasing air pollution own the right to emit 1,321 tons per year of sulfur dioxide ...