Baralyme is a mixture of 80%

calcium hydroxide Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca( OH)2. It is a colorless crystal or white powder and is produced when quicklime ( calcium oxide) is mixed with water. Annually, approxim ...

and 20%

barium hydroxide Barium hydroxide is a chemical compound with the chemical formula Ba(OH)2. The monohydrate (''x'' = 1), known as baryta or baryta-water, is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form. ...

compounds that is used as an alternative to

soda lime Soda lime, a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO), is used in granular form within recirculating breathing environments like general anesthesia and its breathing circuit, submarines, rebreathers, and hyperbaric chambers and u ...

to absorb the exhaled carbon dioxide in a closed circuit anesthetic system.Mosby's Medical Dictionary, 8th edition. 2009, Elsevier. The substance has been used for carbon dioxide scrubbing in diving bells and the U.S Navy's engineered

SEALAB SEALAB I, II, and III were experimental underwater habitats developed and deployed by the United States Navy during the 1960s to prove the viability of saturation diving and humans living in isolation for extended periods of time. The knowledge ...

's I, II, and the failed SEALAB III.

References

{{reflist Anesthesia Rebreather components