OXYSORB - Absorbing Oxygen Now!

‘Oxygen Absorber Australia’ & ‘Oxygen Scavenger Australia’ are wholly owned business names of Wholesale Group International Pty. Ltd. (Australia)


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Trademark: OxySorb™

(Registered Patents & Trademark of Wholesale Group International Pty. Ltd.

Australian Patent; 2017204636

    1. Australia; 145607719102141859027
    2. United States of America; 8751572787821371
    3. China Trademarks Class 1 (27413625), Class 16 (35596650), Class 20 (355913770)

Authorised distributor of the OxyFree trademark (Australia)

Registered Film Design (Australia)

Research regarding oxygen absorbers and active packaging see Miltz & Perry 2004Han 2005, Rooney 2005Kadoya 2012, Tian et. al. 2013, Realini & Marcos 2014 & Cichello 2015.

Oxygen absorbers are referred to by various terms, such as ‘Oxygen Scavengers’, ‘Oxygen Absorber Packets’, ‘O2 absorbers’, or ‘Oxygen Packs’.

Used for food storage, including;

      –   Fresh fruit and vegetables (Charles et. al. 2003)

       Walnuts (Jensen et. al. 2003) & Almonds (Mexis & Kontominas 2010)

       Fruit colour stabilizer (Tarr & Clingeleffer 2005)

–    CO2 absorbers; strawberries (Aday et. al. 2011; Kartel et. al. 2012)

–    Sardines (Suzuki et. al. 1985)

–    Pharmaceutical and vitamin products etc., and even as a natural insecticide in stored goods (Tarr and Clingeleffer 2005).

       Sliced wheat bread (Latou et. al. 2010)

       Gluten free bread (Gutiérrez et. al. 2011)

       Rainbow trout fillets (Mexis et. al. 2009)

       Catfish steaks (Mohan et. al. 2006)

       Chicken meat (Mexis et. al. 2012)

       Pork sausages (Martínez et. al 2006)

       Chocolate (Mexis et. al. 2010)

       Milk powder (Thomsen et. al. 2005)

       Meat products (Kerry et. al. 2006)

       Lipid oxidation (Tian et. al. 2013)

       Added to film/ ascorbic acid (vitamin C) (Dave et. al. 1997)

Oxygen absorbers can be store in containers with a high oxygen barrier (i.e. HDPE tubs; packaging [PVdC coated PET/ nylon] or Mylar bags

Oxygen absorbers are used by “preppers” with the most common brands are OxySorb and OxyFree (Wholesale Group International), Ageless (Mitsubishi)

These brands have HACCP and USFDA certification

They can be used with silica gel or clay gel desiccants.

Sizes; 20cc, 30cc, 50cc, 100cc, 200cc, 300cc, 500cc, 1000cc, and 2000cc.

The correct sized oxygen absorber cannot be calculated using a size chart or calculator. There are a lot of variables, such as food moisture content, OTR, WVTR, seal width and heat seal curve of the polymer used, that needs to be discussed with us. A lot of websites claim this, but these people are just unqualified and misleading you.

Pet safety; if a dog has eaten an OxyFree and OxySorb oxygen absorber, they are non-toxic but we cannot comment about other brands. However, do not microwave any food containing an oxygen absorber – discard it immediately. Although the chemicals of these products are non-toxic and non-dangerous, you should still look for medical care if one is swallowed.

Beware of authors’ on Youtube claiming the use of heat pads and “ Oxygen absorbers, their dirty little secret exposed“, heat pads are not FDA approved for contact with food and may contain heavy metals.

What is the difference between an oxygen absorber and silica gel?

Both absorb moisture primarily and thus are desiccants, but in a step 2 process, the oxygen absorber also absorbs oxygen. What is the black powder inside? Ferrous carbonate, activated carbon, salt and moisture.

By viewing the indicator color, you can determine the quality or condition of the oxygen absorber. For non-ferrous alternatives, such as vitamin C, contact us. The OxySorb oxygen absorbers are not-reusable but can be recycled as a soil conditioner [IP Australia Patent; 2017204636]. With Oxygen Absorbers and shelf-life, we are the market leaders in innovation and technology.



Patent 1 (Oxygen Absorber Re-Use Soil Conditioner)

Patent 2 – Cellophane Based Biodegradable Oxygen Absorber
Read More Here – Oxygen Absorber Summary (Scientific Evidence by trademark owner for use of trademarked oxygen absorbers).

Publication; ‘Oxygen absorbers in food preservation: a review’.

Youtube Video’s of OxySorb, Silica Gel Desiccant Dispenser Machine

Video 1 Video 3
Video 2 Video 4

Oxygen Absorber and Silica Gel Dispenser Machine Click Here

How Does an Oxygen Absorber Work?

When an Oxygen Absorber is instituted correctly, it absorbs moisture to a minor degree (atmospheric moisture) and mostly oxygen. Composed of black powder “ferrous carbonate”, with activated carbon, calcium carbonate/ salt.

Once the moisture is absorbered onto the activated carbon, the ferrous carbonate in close proximity is oxidized to ferric carbonate (i.e. rust).

Prior to implementing the oxygen absorber, the total atmospheric air volume contains 20.90% oxygen.

Volume is measured in cubic centimeters (cc)/ milliliters (mL). The oxygen absorber reduces the oxygen concentration of the inside of the container/ modified atmospheric packaging to 0% (effectively nitrogen flushing the product) (i.e. 300cc oxygen absorbing satchel used; assuming that there is 300mL oxygen in the food packet or container or 5 x 300mL of total atmospheric air headspace = 1500ml (cc) of air).

Thus, the nitrogen concentration of the inside of the container will then become 99.6%; stoping aerobic bacteria fungi/ mould. 

The oxygen absorber will continue to absorb oxygen in the presence of packaging that has a high OTR (oxygen transmission rate) and also any micro-leaks that maybe present.

The advantages of the oxygen absorber satchels versus nitrogen flushing as reported by actual customers include;

Safe; no need for gas cylinders (eg. cylinder hire or extra OHS on site for this product) Accurate; flushing requires quick sealing of the lid (within seconds) versus 1 hour safety window with oxygen absorbers

No capex required; inexpensive, flexible and versitile

Questions about Oxygen Absorbers? Please click here to contact us for further information.

Literature Review of Oxygen Absorber Applications

Cichello SA. (2015). Oxygen absorbers in food preservation: a review. J Food Sci Technol. 2015 Apr;52(4):1889-95. doi: 10.1007/s13197-014-1265-2. Epub 2014 Feb 6.

Common Questions are answered in the above mentioned expert scientific publication

  1. What Are Oxygen Absorbers?
  2. What is inside an oxygen-absorbing satchel or Oxygen Absorber?
  3. How do oxygen absorbers work?
  4. What is the function of Oxygen Absorbers?
  5. What Do Oxygen Absorbers Do?
  6. Perceived versus Real Benefits?
  7. What Are The Benefits Of Using Oxygen Absorbers?
  8. How To Use an Oxygen Absorber?
  9. How To Measure Volume of Containers/ Packaging?
  10. How to increase food shelf life with modern packaging?
  11. What factors affect the freshness of food? (oxygen, moisture, UV, temperature).
  12. What are the Applications of Oxygen Absorbers?
  13. Safety Concerns?
  14. How to Use Oxygen Absorbers and Silica Gel?

Click here for the clarification of the questions above.

How to Open and Re-Seal a bag of Oxygen Absorbers?https://www.youtube.com/embed/thNJPNi31mM

Food Manufacturers; please also see the webpage for the Oxygen Absorber Dispenser

Oxygen Absorber Types & Applications

Re-Packaging Instructions please Click Here

Material and Saftey Data Sheet please MSDS

Buy Silica Gel and Clay Desiccants Online Click Here

  1. AS2400 (1983) Compliant
  2. HACCP (ISO22000)
  3. ISO14001
  4. ROHS Compliant – 2002
  5. 95/EC – ISO9001 Quality Management Standard
  6. Laboratory Analysis – Highest Level of Purity

For More Information Please Download our PDF

For More Of Our Product Range Click Here


  1. Charles, F., Sanchez, J., Gontard, N. (2003). Active Modified Atmosphere Packaging of Fresh Fruits and Vegetables: Modeling with Tomatoes and Oxygen Absorber. Journal of Food Science, 68(5), 1736–1742.
  2. Cichello SA.* (2015). Oxygen absorbers in food preservation: a review. J Food Sci Technol. 2015 Apr;52(4):1889-95. doi: 10.1007/s13197-014-1265-2. Epub 2014 Feb 6.
  3. Jensen, P.N., Sørensen, G., Brockhoff, P., and Bertelsen, G. (2003). Investigation of Packaging Systems for Shelled Walnuts Based on Oxygen Absorbers. Journal of Agricultural and Food Chemistry, 51(17), 4941-4947.
  4. Suzuki, H., Wada, S.,, Hayakawa, S., Tamura, S (1985). Effects of Oxygen Absorber and Temperature on ω3 Polyunsaturated Fatty Acids of Sardine Oil during Storage. Journal of Food Science, 50(2), 358–360.
  5. Tarr, C.R., and Clingeleffer, P. R. (2005). ‘Use of an oxygen absorber for disinfestation of consumer packages of dried vine fruit and its effect on fruit colour’. Journal of Stored Products Research, 41(1), 77-89.
  6. *Cichello, S.A. is the director of Wholesale Group International Pty Ltd., and Senior Honourary Research fellow, Agricultural Sciences Department, The University of Melbourne, Australia