Hypochlorous Acid

Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

hypochlorous acid

[¦hī·pə′klȯr·əs ′as·əd]
(inorganic chemistry)
HOCl Weak, unstable acid existing in solution only; its salts (such as calcium hypochlorite) are used as bleaching agents.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hypochlorous Acid


HCIO, a very weak monobasic acid, in which chlorine is in the + 1 oxidation state. Hypochlorous acid is unstable, decomposing gradually even in dilute aqueous solutions. Both the acid and its salts (hypochlorites) are strong oxidizing agents. The crystal hydrate LiClO· H2O withstands prolonged storage. NaClO· H2O decomposes explosively at 70°C, while KClO is known only in the form of aqueous solutions. Ca(ClO)2is completely stable in dry form but decomposes in the presence of water and carbon dioxide. Mg(ClO)2 is more stable. Hypochlorous acid and hypochlorites readily decompose with the liberation of oxygen and thus are commonly used for bleaching pulp and fabrics, as well as for sanitation purposes.

Hypochlorous acid is produced by the hydrolysis of chlorine or by the dissolving of the chlorine oxide Cl2O in water. Calcium hypochlorite, sodium hypochlorite, potassium hypochlorite, and lithium hypochlorite are produced on an industrial scale by the chlorination of milk of lime and the corresponding alkalies.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Arnold, "The action of hypochlorous acid on phosphatidylcholine liposomes in dependence on the content of double bonds.
Hypochlorous acid as a potential wound care agent: part I.
Hypochlorous acid stress in Escherichia coli: Rresistance, DNA damage, and comparison with hydrogen peroxide stress.
Winterbourn, "Kinetics of the reactions of hypochlorous acid and amino acid chloramines with thiols, methionine, and ascorbate," Free Radical Biology and Medicine, vol.
The boffins have explained in the November 14th issue of the journal Cell, a Cell Press publication that they have found the effect of hypochlorous acid, the active ingredient contained in bleach, causes the unfolding of proteins in bacteria in much the same was that heat stress or fever does.
When it enters the water, two acids are formed: hydrochloric acid and hypochlorous acid. The hydrochloric acid is pretty much a useless byproduct.
As chlorine is added to water, hypochlorous acid (free chlorine) is formed.
Further arjungenin also exhibited greater inhibitory action on the hypochlorous acid production from human neutrophils.
Tomoco2 Equipment Company (Loganville, GA) has patented a system to control pathogens on a target element, wherein the target element is subjected to hypochlorous acid. The present invention incorporates the use of hypochlorous acid as a pathogen control medium, wherein a hypochlorous acid stream of between about 4.3 and 7.0 pH as a pathogen reduction agent is utilized.
He was meant to pump two chemicals, hypochlorous acid and hydrochloric acid, into separate tanks.