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carbamide |
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ureaor carbamideOne of the simplest organic compounds and the first synthesized from inorganic raw materials (see inorganic compound), by Friedrich Wöhler (1800–82) in 1828. It is the diamide of carbonic acid (H2NCONH2; see amide; carbon dioxide). The chief nitrogenous end product of protein breakdown in mammals and some fishes, it occurs not only in urine but also in blood, bile, milk, and perspiration. It is one of the industrial chemicals produced in vast amounts. With its high nitrogen content and low price, it is a major agricultural fertilizer and animal-feed ingredient. It is also used to make urea-formaldehyde plastics (including foamed plastics; see polyurethanes), to synthesize barbiturates, as a stabilizer in explosives, and in adhesives, hydrocarbon processing, and flameproofing. carbamide [′kär·bə‚mīd] (organic chemistry) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Sensitivity occurs when the chemical by-products of carbamide and hydrogen peroxide used in whitening treatment passes through the enamel and dentin and into the pulp. AdBlue is a non-toxic, colorless, odorless, water-soluble carbamide solution carried in a separate tank that is injected into the exhaust stream at rate of 1% to 3% of the diesel fuel being consumed. 1,12) Agents in current use or under evaluation include various formulations of oleic acid polypeptide complex, triethanolamine polypeptide, carbamide peroxide, olive oil, mineral oil, sodium bicarbonate, acetic acid, and docusate sodium. |
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