oil of vitriol
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oil of vitriol: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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oil of vitriol[′ȯil əv ′vit·rē‚ōl]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.