oxidizing agent


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oxidizing agent

[′äk·sə‚dīz·iŋ ‚ā·jənt]
(chemistry)
Compound that gives up oxygen easily, removes hydrogen from another compound, or attracts negative electrons. Also known as oxidant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
These moieties increase the chances of side products formation when p-chloranil is used as oxidizing agent. Furthermore, the chloro groups of p-chloranil are susceptible to nucleophilic displacement by the amino groups of 1A.
In earlier studies, Cao had found that vitamins C and E can actually be turncoats while in the company of transition metals - such as copper or iron ions - and become oxidizing agents themselves.
Along with a suitable complexing agent, oxidizing agent is always required as in most of the cases, only a fraction of uranium in the underground ore bodies exists in the oxidized form (soluble hexavalent form, U+6) while a large portion exists in the insoluble tetravalent (U+4) form that must be oxidized.
Viking scientists had suggested that superoxides trapped on the sample might have released the oxygen, but Plumb says "superoxides are not stable in the carbon dioxide atmosphere of Mars." Instead, his group cites a 1983 Soviet report, unrelated to Viking, that ultraviolet or X-ray radiation can break down metal nitrates into an oxidizing agent called peroxonitrite (the lander instruments could not detect nitrogen).
It entails applying to the tooth an oxidizing agent comprising between about 0.005 to about 3.0% by weight of a compound of the formula R1 (Mn04)n, or mixtures thereof, wherein R1 is H, an alkali-metal, or an alkaline earth metal, and n is 1 when R1 is H or an alkali-metal and 2 when R1 is an alkaline earth metal; and a reducing agent comprising between about 1-3% by weight of a peroxygen compound, or mixtures thereof, wherein the peroxygen compound is hydrogen peroxide, urea peroxide, an alkali-metal peroxide or an alkaline earth metal peroxide.
An oxidizing agent such as ferric chloride initiates polymerization.
US 8,211,409 B2--a whitening oral care composition comprising fused silica and an oxidizing agent;
8,029,578 B2; The Procter & Gamble Company, Cincinnati, OH, has patented a hair coloring or bleaching composition that is comprised of an oxidizing agent, a gel network thickening system comprising first surfactant component selected from the group consisting of C14 to 30 alkyl phosphate, C14 to C30 alkyl ether phosphate and mixtures thereof; a second component selected from the group consisting of C14 to C30 fatty alcohols; and a third surfactant component selected from the group consisting of polyoxyethylene C14 to C30 alkyl ethers; and at least 3% of a polyol selected from the group consisting of propylene glycol, butoxydiglycol, ethoxydiglycol, hexylene glycol, dipropylene glycol, glycerol, polyglycerol, and mixtures thereof.
So they whitened their wash with an oxidizing agent. Hydrogen peroxide and ascorbic acid each worked well.
7,909,887 B2; L'Oreal S.A., Paris, has patented a process for dyeing human keratin fibers in the presence of at least one oxidizing agent. It entails applying to the fibers at least one anhydrous cosmetic composition that contains at least one fatty substance, at least one organic amine having a pKb less than 12 at 25[degrees]C, and at least one surfactant; at least one composition (B) that is comprised of an oxidizing agent; at least one composition (C) comprised of a dye chosen from oxidation dyes and direct dyes; and leaving the compositions on the fibers for a period of time sufficient to dye them.