Carbamic acid

Structural formula
General
Surname	Carbamic acid
other names	Carbamic acid Aminomethanoic acid Carbonic acid monoamide
Molecular formula	CH 3 NO 2
Brief description	colorless solid with a pungent odor at low temperatures see also dry ice
External identifiers / databases
CAS number 463-77-4 PubChem 277 ChemSpider 271 DrugBank DB04261 Wikidata Q412078
properties
Molar mass	61.04 g mol −1
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Carbamic acid , outdated carbamic acid , is the mono- amide of carbonic acid and - in contrast to the diamide urea - like carbonic acid itself, unstable. Carbamic acid breaks down into ammonia and carbon dioxide . Their salts and esters are systematically referred to as carbamates , and the esters are often also referred to as urethanes .

Its salts - like ammonium carbamate - and its esters are more stable than acids and can therefore be isolated . The substituted acids usually decompose with the release of carbon dioxide, but some are stable. A medically used ester is the glaucoma drug carbachol (choline carbamate). In biology, carbamic acid occurs in phosphorylated form as carbamoyl phosphate and plays a role in the urea cycle or in the biosynthesis of pyrimidine bases.

Carbamic acid is a constitutional isomer to nitromethane .

Individual evidence

1. ^ ^{A b} Benno Krieg, Christoph Janiak: Chemistry for medicine: and students of other life sciences. 7th edition, Walter de Gruyter, 2004, ISBN 978-3-11-017999-6 , p. 281.
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ^ Hans Beyer and Wolfgang Walter : Organic Chemistry , S. Hirzel Verlag, Stuttgart 1984, ISBN 3-7776-0406-2 .