What is "baralyme"

alt. A granular mixture of barium hydroxide and calcium hydroxide, used to absorb carbon dioxide in closed environments (such as spacecraft) n. A granular mixture of barium hydroxide and calcium hydroxide, used to absorb carbon dioxide in closed environments (such as spacecraft)

Baralyme is a mixture of 80% calcium hydroxide and 20% barium hydroxide compounds that is used to absorb the exhaled carbon dioxide in an anesthetic closed circuit system.

The substance has been used for carbon dioxide scrubbing in diving bells and the U.S Navy's engineered SEALAB's I, II, and the failed SEALAB III.