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see sulfuric acidsulfuric acid,
chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Concentrated Sulfuric Acid

When heated, the pure 100% acid loses sulfur trioxide gas, SO3
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(or fuming sulfuric acid), a solution of sulfur trioxide, SO3, in anhydrous sulfuric acid. It is a colorless liquid that fumes in moist air because of the reaction between the vapors of SO3 and H2O, which leads to the formation of poorly volatile H2SO4. Oleum containing 18–20 percent SO3 is usually produced; the SO3 content is sometimes as high as 60 percent. Oleum is used for sulfation of organic compounds.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Latin name for oil.
(inorganic chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Supply of the additives to Belarus and Azerbaijan will result in a new leap in the development of the Biysk Oleum Plant and will increase itsrevenue to more than $16 million.