Oxygen absorber packs remove oxygen from sealed spaces to prevent mold growth, insect infestation, and oxidation in food and non-food items during long-term storage. They contain iron oxide powder that absorbs up to 99% of oxygen and changes color to indicate effectiveness. They are available in various sizes for different storage capacities and can be used for food, pharmaceuticals, and medical diagnostic kits.
An oxygen scavenger is a specially formulated and packaged chemical that removes all or a significant percentage of oxygen in an appropriately sized and sealed space. These packs are primarily used as a preservation measure to prevent mold growth, insect infestation, and all other oxygen-related degradations in sealed foods. They can also prevent oxidation on non-food items stored for extended periods. The active agent in oxygen absorber packages is typically iron oxide powder packaged in a material that holds the dust but allows air and moisture to penetrate. Oxygen absorbers are available in a range of sizes to suit different storage vessel capacities.
Long-term food storage can be problematic due to the negative effects that prolonged exposure to oxygen can have. Food grows moldy, rancid, and becomes infested with insects when exposed to oxygen-rich air. Also, non-food metal items rust when stored for long periods. These problems can, to a large extent, be prevented if the goods are stored in vacuum packaging. This is not always practical or even possible, and other solutions must be found to keep goods in long-term storage and to extend the shelf life of retail products.
Oxygen absorber packs are generally a simple and inexpensive way to remove nearly all of the oxygen from goods contained in sealed packages. These packs consist of a fine iron oxide-based powder in a bag or package that prevents the powder from escaping but allows moisture and air to penetrate. When the powder is exposed to humidity in the air, it begins an oxidation process which causes it to absorb up to 99% of the oxygen in a suitably sized container. The emphasis here is on proper sizing because each size of oxygen absorber is rated for a maximum storage vessel capacity.
Generally the oxygen absorber is formulated in such a way that it changes color, typically from bright pink to dark blue, when exposed to oxygen. This provides a good visual indication that the absorber is working properly. Oxygen Absorber Packs can be used to remove oxygen from dry and whole fat foods, processed and aged meats, dried fruits, nuts, spices, flour, grains and pasta products. They are also often used to prevent oxygen degradation of pharmaceuticals and medical diagnostic kits. Absorbers are available in a range of sizes calibrated to work well with different capacity storage vessels.
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