Editing Lithium hydroxide (section)

===Carbon dioxide scrubbing===
{{Main|Carbon dioxide scrubber}}
Lithium hydroxide is used in [[breathing gas]] purification systems for [[spacecraft]], [[submarine]]s, and [[rebreather]]s to remove [[carbon dioxide]] from exhaled gas by producing [[lithium carbonate]] and water:<ref>{{cite journal|vauthors=Jaunsen JR|year=1989|title=The Behavior and Capabilities of Lithium Hydroxide Carbon Dioxide Scrubbers in a Deep Sea Environment|url=http://archive.rubicon-foundation.org/4998|journal=US Naval Academy Technical Report|id=USNA-TSPR-157|access-date=2008-06-17|archive-url=https://web.archive.org/web/20090824104846/http://archive.rubicon-foundation.org/4998|archive-date=2009-08-24|url-status=usurped}}</ref>
:{{chem2|2 LiOH*H2O + CO2 → Li2CO3 + 3 H2O}}
or
:{{chem2|2 LiOH + CO2 → Li2CO3 + H2O}}
The latter, anhydrous hydroxide, is preferred for its lower mass and lesser water production for respirator systems in spacecraft. One gram of anhydrous lithium hydroxide can remove 450&nbsp;cm<sup>3</sup> of carbon dioxide gas. The monohydrate loses its water at 100–110&nbsp;°C.