Baralyme is a mixture of 80% calcium hydroxide and 20% barium hydroxide compounds [1] [2] [3] that is used as an alternative to soda lime to absorb the exhaled carbon dioxide in a closed circuit anesthetic system. [4]
The substance has been used for carbon dioxide scrubbing in diving bells and the U.S Navy's engineered SEALABs I, II, and the failed SEALAB III.[ citation needed ]