Oxygen absorbers are used in food storage to reduce oxygen inside sealed packaging. They are not the same as desiccants. A desiccant manages moisture. An oxygen absorber manages oxygen. For food storage, the distinction matters because moisture and oxygen cause different types of spoilage, and one product does not replace the other.
This guide explains how oxygen absorbers work, how to think about 50cc–500cc sizing, why barrier packaging matters, what to consider with high-moisture foods, and how to choose between oxygen absorbers and desiccants.
Oxygen absorbers are supplied as iron-based or organic non-iron systems. They are available from 50cc to 500cc. When placed inside a sealed package, they are designed to reduce the oxygen level in the enclosed headspace.
Iron-based absorbers use oxidation chemistry to bind oxygen. Organic non-iron absorbers use organic oxidation systems. Both formats are intended for use in packaging where oxygen control is part of the preservation strategy.
Oxygen absorbers do not remove moisture. They do not replace refrigeration, proper drying, thermal processing, or other food-safety steps. They are one component of a packaging system. The package must be sealed and have the appropriate barrier to hold the reduced-oxygen environment.
Oxygen absorber sizes are often expressed in cubic centimeters, or cc. The 50cc–500cc range covers small retail packs through larger food storage bags. The correct size depends on:
A common mistake is to size only by the weight of the food. Two packages with the same food weight can have very different headspace, product density, and barrier performance. A better approach is to calculate the total oxygen load and then select the absorber size that can handle it within the required time.
For procurement, ask your supplier to recommend a size based on the actual package. If you are testing, start with the nearest available size in the 50cc–500cc range and validate with real product and packaging. Free samples are available for trials.
Oxygen absorbers work best in barrier packaging. If the film allows oxygen to pass through quickly, the absorber will be consumed by incoming oxygen and may not maintain a low-oxygen environment for the intended shelf life.
Key packaging factors:
For food storage, the package should be sealed according to the film manufacturer’s or packaging equipment supplier’s instructions. Even a small seal channel can allow oxygen ingress and cause premature failure. Validate the full package, not just the absorber.
If the package is not a high-barrier structure, an oxygen absorber may still provide short-term oxygen reduction, but it should not be expected to extend shelf life beyond what the package can support. Test with the actual film, bag, pouch, can, or container.
Oxygen absorbers do not control water activity or moisture. High-moisture foods can still support mold, yeast, and bacterial growth even when oxygen is reduced. Some anaerobic microorganisms can also grow without oxygen. For these reasons, oxygen absorbers are not a universal solution for high-moisture foods.
When evaluating high-moisture foods, consider:
If moisture is the main risk, a desiccant may be more appropriate. If both oxygen and moisture are risks, the packaging system may need both an oxygen absorber and a desiccant, along with a barrier package and validated process.
Do not use an oxygen absorber to compensate for a wet product or a poor drying process. Food safety should be confirmed by qualified technical and regulatory professionals before commercial use.
Desiccants and oxygen absorbers solve different problems.
Desiccants:
Oxygen absorbers:
Some food storage applications use both. The desiccant manages moisture while the oxygen absorber manages oxygen. The package must be designed so both can work without interfering with each other.
Oxygen absorbers are typically supplied as small sachets. They should be selected for food-contact compliance and packaging compatibility. Confirm:
For food storage, documentation matters. Available certifications and documents include ISO 9001, RoHS, REACH, DMF Free, FDA, MSDS, BSCI, and GMP. Ask for the specific document that applies to the exact absorber and packaging you are buying.
A trial is the most practical way to confirm absorber size and package performance. Use free samples and test with the actual food product and final package.
A basic validation plan: 1. Define the target oxygen level and shelf life. 2. Prepare control packages without an absorber. 3. Prepare test packages with the candidate 50cc–500cc absorber. 4. Use the same product, fill weight, headspace, and sealing process. 5. Seal according to the production procedure. 6. Store at the expected temperature and humidity. 7. Test oxygen levels at planned intervals. 8. Inspect for spoilage, off-odor, texture change, or package failure. 9. Check seals and film integrity. 10. Document results and repeat if the package, product, or supplier changes.
For high-moisture foods, include moisture and water activity checks in the trial. If mold or spoilage appears, an oxygen absorber alone may not be sufficient.
Include the following in your request:
MOQ for small gram bags is 3,000 pcs. Custom packaging or size is 100,000 packs. Standard lead time is 7–15 business days, and custom orders are typically 20–30 days.
Shenzhen Sisuobo Desiccant Co., Ltd. operates under the Absorb King and Ensobo brands. The group parent, Shenzhen Absorb King Desiccant Co., Ltd., was founded in 2007, and Sisuobo was established as a branch in 2014. The company is an integrated manufacturer and trader with two factories in Jiangmen, more than 10,000 ㎡ of production area, over 100 sets of production and supporting equipment, and annual output of more than 10,000 tons. Products are exported to 45 countries and regions. The mission is to solve moisture and mold problems in various industries.
Oxygen absorbers are part of a broader moisture and oxygen control program. If your food storage application also needs moisture control, the same supplier can discuss silica gel, calcium chloride, natural mineral desiccants, and container desiccants.
Start with the product, package, and target shelf life. Then select an oxygen absorber size from 50cc to 500cc, confirm the barrier packaging, and validate with samples. If moisture is also a risk, consider a desiccant alongside the oxygen absorber.
Contact Mrs. Angle at sales@desiccantmanufacturer.com or use the WhatsApp number published on our website. Address: Room 603, Xingji Building, Shenzhen City, Guangdong, China.
Request Free Samples for your food storage trial. Get Bulk Pricing for oxygen absorbers and desiccants in your required sizes.
A sizing walkthrough can clarify how oxygen absorber ratings work. The cc value generally refers to the oxygen volume the absorber is designed to handle, not the total package volume. Start by estimating headspace, not just product weight. For example, a 5-gallon mylar bag might hold 10 kg of dry grains and leave about 4 L of headspace. Air is roughly 21% oxygen, so 4,000 cc of air contains about 840 cc of oxygen. Add a safety margin for residual air, product voids, and sealing variation. If the margin is 10%, the target becomes about 924 cc. Because standard absorbers range from 50cc to 500cc, two 500cc absorbers provide 1,000cc of nominal capacity. For a smaller 2 L headspace, oxygen volume is about 420 cc, so a 500cc absorber is a reasonable starting point.
Do not size from package volume alone. A fluffy product traps more air than a dense block. A product that releases oxygen or carbon dioxide may need more capacity. A package with a poor oxygen barrier will lose the reduced-oxygen atmosphere over time. If the mylar bag is thin, scratched, or poorly sealed, even a correctly sized absorber may not maintain the target.
High-moisture foods need different thinking. Oxygen absorbers do not remove moisture. They can help reduce oxygen in a sealed package, but they do not replace drying, refrigeration, thermal processing, or other food-safety steps. If a food has high water activity, sealing it with an oxygen absorber alone may create conditions that do not address mold, bacterial growth, or spoilage. Moisture control may require a desiccant, but the choice depends on the food, package barrier, and storage temperature. For high-moisture products, confirm the preservation process before relying on an oxygen absorber.
Mylar bag pairing should focus on barrier and seal quality. Use a high-barrier, puncture-resistant mylar or foil laminate that suits the product and storage period. Keep headspace as low as practical, but leave enough room for the absorber and a clean seal. Heat-seal according to the bag supplier’s instructions, inspect the seal for wrinkles or channels, and protect the bag from sharp edges. When both oxygen and moisture are risks, use an oxygen absorber for oxygen and a desiccant for moisture. Validate the combination with a trial pack, because each product and barrier behaves differently.