Lithium Hydroxide Canister, Command Module, Apollo 11


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

The lithium hydroxide canister was designed to maintain a pure-oxygen environment within the Apollo spacecraft by filtering out carbon dioxide, odors, and debris. The LiOH within the canister absorbed carbon dioxide, and carbon in the form of charcoal eliminated odors. The circulation within the spacecraft also carried debris to the canister, trapping it in the filter.

This filter was flown and deployed in the Command Module "Columbia" during the historic Apollo 11 lunar-landing mission in July 1969 and transferred to the Smithsonian in 1970.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


Credit Line

Transferred from NASA


  • Anodized Aluminum
  • Steel
  • Nylon
  • Plastic
  • Paint


3-D: 18.4 x 13.3 x 18.4cm (7 1/4 x 5 1/4 x 7 1/4 in.)

Country of Origin

United States of America


SPACECRAFT-Manned-Life Support

Inventory Number