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pyrosulphuric acid

/ (ˌpaɪrəʊsʌlˈfjʊərɪk) /
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noun
a fuming liquid acid made by adding sulphur trioxide to concentrated sulphuric acid. Formula: H 2 S 2 O 7Also called: disulphuric acid See also fuming sulphuric acid
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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