a.1.(Chem.) Pertaining to an acid so called.
Carbamic acid
(Chem.) an amido acid, H2N.CO2.H, not existing in the free state, but occurring as a salt of ammonium in commercial ammonium carbonate; - called also amido formic acid.
References in periodicals archive ?
In the case of PUR foam production, water reacts with isocyanate, forming carbamic acid which decomposes to an amine and carbon dioxide which acts as the foam blowing agent.
On the tear-off of young abalone from the attachment site by four anaesthetics (ethyl carbamic acid, magnesium sulphate, chloral hydrate and sodium diethylbarbituric acid).
Exposure of young children working on Mexican tobacco plantations to organophosphorous and carbamic pesticides, indicated by cholinesterase depression.
2C3, 3G4, A6 project, ABT-751 (E7010), AE-941, AEE788, AES-14, AG-013736, AGRO100, AMG 706, AMN107, AN-152, AN-238 and AN-162, AP23573, APC8015, ARQ 501, AVE8062, AZD2171, becatecarin, Bismuth-213-HuM195, BMS-275291, BMS-354825, carbamic acid, CEP-7055, Cerepro (Solima), Cervarix, CG53135, CH-1504, CHIR-12.
This two-step reaction is controlled by the much slower isocyanate/water reaction, producing a substituted carbamic acid that breaks down into an amine and carbon dioxide gas.
The samples are acidified at the site of measurement when the free carbamic acid formed, which is unstable in acidic solution, immediately decomposes to amine and C[O.
The urea bond hydrolyzes to a carbamic acid and an amine.
OMMT contained two hydroxyls that generated stronger interactions with TPU, which obtained carbamic acid ester, compared with that of PLA, which had carboxyl at the ends of the molecular chains.
This has been reported (22) to involve an initial reaction with water to form an unstable carbamic acid intermediate that spontaneously decarboxylates into an amine and carbon dioxide, as shown in Figures 4A-C.
As a chemical blowing agent, water reacts with isocyanate (RNCO) and produces carbamic acid (RNHCOOH) which further decomposes into carbon dioxide and thus generates gas bubbles in the resin according to reaction Schemes 1 and 2 forming an amine (RN[H.
In chemical blowing, water (most widely used blowing agent) reacts with isocyanate to form unstable carbamic acid, which immediately decomposes into an amine and carbon dioxide (9), (10).