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Oxygen absorber

From Wikipedia, the free encyclopedia

An oxygen absorber
An oxygen absorber

Oxygen supports the growth of microorganisms and causes changes in color and rancid odors in packaged foods. Plastic packaging is less able to exclude oxygen from packaged foods than are the older glass and metal containers. Oxygen absorbers collect any oxygen that might diffuse into a food package.

An oxygen absorber is a packet filled with iron particles and salt that works to retain oxygen. Moisture in the package or absorbed by the package combines with the iron, salt and oxygen to rust the iron. This traps the oxygen and usually lets off a small amount of heat. They are used in food packaging to prevent spoiling.

Other technologies are used as well. The Ageless oxygen absorber, as developed by Mitsubishi Gas Chemical, is a sachet of iron (II) carbonate rather than the actual metal powder.

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