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This buffer ampule was flown on Apollo 11 Command Module and was returned unused. To insure that drinking water during the Apollo missions did not become contaminated with microorganisms, astronauts used chemical disinfectants. 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 an inhibitor, sodium nitrate (to slow corrosion). After waiting the 20 additional minutes for the chemicals to disperse throughout the tank, the water was potable.

In 1970, NASA transferred it to the Smithsonian along with the rest of the contents of the Command Module.

Display Status

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

Object Details

Country of Origin

United States of America

Type

SPACECRAFT-Crewed-Life Support

Manufacturer

Unknown

Dimensions

3-D: 7.9 x 3.5cm (3 1/8 x 1 3/8 in.)

Materials

Sodium dihydrogen phosphate
Teflon
Paint
Resin

Inventory Number

A19791723000

Credit Line

Transferred from the NASA - Johnson Space Center

Data Source

National Air and Space Museum

Restrictions & Rights

Usage conditions apply
For more information, visit the Smithsonians Terms of Use.