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hypophosphoric acid

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noun
  1. a tetrabasic acid, H4P2O6, produced by the slow oxidation of phosphorous in moist air.
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Origin of hypophosphoric acid

First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for hypophosphoric acid

hypophosphoric acid

noun
  1. a crystalline odourless deliquescent solid: a tetrabasic acid produced by the slow oxidation of phosphorus in moist air. Formula: H 4 P 2 O 6
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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