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Desiccants & Adsorbents

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Oxygen Absorber Packets, Strips & Labels


FreshPax is a patented oxygen absorber pioneered by Multisorb Technologies to protect packaged foods, pharmaceuticals and other products against spoilage, mold growth, color change, rancidity, loss of nutritive values, insect damage and loss of quality. Produced in packet form using food grade ingredients, FreshPax irreversibly absorbs oxygen inside sealed packaging to less than 0.01% and maintains this level.

FreshPax packets have several distinct advantages for your product packaging:

  • Extends shelf life
  • Prevents growth of aerobic pathogens and spoilage organisms, including molds
  • Eliminates the need for additives such as BHA, BHT, sulfur dioxide, sorbates, benzoates, etc.
  • Use with or without gas flushing/vacuum packaging to absorb virtually all oxygen and absorb any oxygen that may permeate the package
  • Available in spool or fan-folded for automatic dispensing

Typical applications include:

  • Pharmaceuticals and vitamins
  • Medical diagnostic kits and devices
  • Breads, cookies, cakes, pastries
  • Nuts and snacks
  • Candies and confectioneries
  • Coffee and tea
  • Whole fat dry foods
  • Processed, smoked and cured meats
  • Cheeses and dairy products
  • Flour and grain items
  • Fresh and pre-cooked pasta and noodles
  • Birdseed and pet food
  • Artwork preservation

Examples of FreshPax Benefits

  • Significantly improves keeping qualities of polyunsaturated fats and oils
  • Helps retain fresh-roasted flavor of coffee and nuts
  • Prevents oxidation of spice oleoresins present in spices themselves and in seasoned foods
  • Prevents oxidation of vitamins A, C and E and extends life of pharmaceuticals
  • Inhibits mold in natural cheeses and other fermented dairy products
  • Delays non-enzymatic browning of fruits and some vegetables
  • Inhibits oxidation and condensation of red pigment of most berries and sauces

FreshPax Oxygen Absorbers vs. Ordinary Technologies

Packaging Method




Reduces and maintains oxygen content in packaging to below 0.01% and maintains this level despite oxygen ingress

Eliminates spoilage, organisms and oxidative chemical reactions in packaging

Vacuum &
Back Flush

Achieves .5 - 2% Residual oxygen

Controls aerobic microbial growth temporarily

Gas Flushing

Approximately 0.5% to 5% oxygen

Provides some control of aerobic microbial growth

Package requirements for successful use of FreshPax
FreshPax has been found to be effective when used with many kinds of packaging materials including EVOH and PVDC. Some important considerations to keep in mind regarding certain types of packaging include:

  • Adequate barrier should be used - Plastic film must be checked for its oxygen permeability
  • Hermetic seals are essential - Non-hermetic seals reduce shelf-life by using up oxygen absorber capacity prematurely
  • Package geometry - The package must be designed so as to allow free circulation of air around the product

It is recommended that application tests with actual materials and equipment be conducted before using and specifying FreshPax. This includes determining the water activity of the product as nearly as possible, at what temperature the product will be packaged, and specifications of the packaging film.

Multisorb Technologies practices a policy of continuous improvement, therefore we reserve the right to discontinue or change specifications, designs or materials, without notice, consistent with sound engineering principles and modern practices.

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