perchloric acid

noun Chemistry.

a colorless, syrupy hygroscopic liquid, HClO4, an acid of chlorine containing one more oxygen atom than chloric acid: used chiefly as a reagent in analytical chemistry.

Nearby words

  1. percheron,
  2. perchery,
  3. perching bird,
  4. perchlorate,
  5. perchloric,
  6. perchloride,
  7. perchlorinate,
  8. perchloro-,
  9. perchloroethane,
  10. perchloroethylene

Origin of perchloric acid

First recorded in 1810–20 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for perchloric acid

perchloric acid

/ (pəˈklɔːrɪk) /


a colourless syrupy oxyacid of chlorine containing a greater proportion of oxygen than chloric acid. It is a powerful oxidizing agent and is used as a laboratory reagent. Formula: HClO 4Systematic name: chloric(VII) acid
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

Medicine definitions for perchloric acid

perchloric acid

[ pər-klôrĭk ]


A clear colorless liquid that is the highest in oxygen content of the series of chlorine acids and is a powerful oxidant used as a catalyst.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for perchloric acid

perchloric acid

[ pər-klôrĭk ]

A clear, colorless liquid that is very corrosive and, under some conditions, extremely explosive. It is a powerful oxidant and is used as a catalyst and in explosives. Chemical formula: HClO4.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.