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Ampule, Chlorine, Apollo 11


Display Status:

This object is on display in the Apollo to the Moon exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

To insure that drinking water during the Apollo missions did not become contaminated with microorganisms, chemical disinfectants were periodically injected into the water supply by the astronauts. A chlorine solution was used for the Command Module. The chlorine (sodium hypochlorite diluted to 1860 mg/L) was contained in 20 cc cylindrical ampules, like this one. Twenty minutes before water was consumed, the ampule was inserted into the water tank. Immediately afterward, a second ampule, containing a buffer (sodium dihydrogen phosphate) was inserted to neutralize the pH of the water, with and inhibitor, sodium nitrate (to slow corrosion). After waiting the 20 additional minutes for the chemicals to disperse throughout the tank, the water was potable.

This ampule was flown on Apollo 11 Command Module and was returned unused. NASA transferred it to the Smithsonian along with the rest of the contents of the Command Module in 1970.

Collection Item Long Description:

Data Source

National Air and Space Museum


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

Credit Line

Transferred from the NASA - Johnson Space Center


Sodium hypochlorite; plastic container


3-D: 7.9 x 3.6cm (3 1/8 x 1 7/16 in.)

Country of Origin

United States of America


SPACECRAFT-Manned-Life Support

Inventory Number