Guanidine

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guanidine

[′gwän·ə‚dēn]
(biochemistry)
CH5N2 Aminomethanamidine, a product of protein metabolism found in urine.
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 It might be outdated or ideologically biased.

Guanidine

 

(also carbamidine). (H2N)2C=NH, colorless hygroscopic crystals; melting point, approximately 50° C. Guanidine absorbs C02 and moisture from the air and forms salts with acids. On hydrolysis it gives urea and ammonia.

Guanidine (or its salts) is obtained by reacting cyanamide with ammonia (or with ammonium salts).

H2N—C≡N + NH3→(H2N)2C═NH

H2N —C≡N +NH4Cl→(H2N)2C═NH.HCI

Guanidine is used to obtain medicinal and explosive substances and ion-exchange resins. A guanidine fragment enters into the composition of guanine (a component of nucleic acids), creatine, and arginine, the antibiotic streptomycin, and tetrodotoxin, a poison of animal origin.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.