What are Oxygen Absorbers?
Oxygen Absorbers are added to enclosed packaging to help remove or decrease the available oxygen in
the package. They are used to help maintain product safety and extend shelf life[1]. There are many
types of Oxygen Absorbers available to cover a wide array of applications[2][3].
The components of an Oxygen Absorber vary greatly, depending on what it is being used for, the water
activity of the product being preserved, and many other factors. Often the oxygen absorber or
scavenger is enclosed in a porous sachet or packet, but it can also be part of packaging films and
structures. For most products, an admixture of iron powder, sodium and activated carbon (charcoal)
has proven quite effective. Iron powder is the primary component, while sodium acts as an activator,
causing the iron particles to rust, effectively reducing the oxygen level in the surrounding atmosphere to
approximately 0.01% when used appropriately. Activated carbon acts as a gas absorbent, further
preserving products and removing unsavory odors.