Oxygen absorbers prevent food from discoloring, developing off-flavors, and spoiling due to oxidation.

Main Ingredients
Iron-based oxygen absorber: Primarily composed of iron powder, along with auxiliary components such as activated carbon, diatomaceous earth, and sodium chloride. Iron powder readily undergoes chemical reactions with oxygen and water in the air, forming substances like ferric hydroxide, thereby consuming oxygen. Activated carbon has an adsorptive effect, increasing the contact area with oxygen and accelerating the reaction rate; sodium chloride and similar compounds can accelerate the oxidation of iron powder.
Sulfite-based oxygen absorber: Mainly composed of sulfites such as sodium hydrosulfite, which utilizes redox reactions with oxygen to remove it. It is often used in combination with alkaline substances like sodium carbonate to adjust the pH of the reaction environment and enhance deoxygenation efficiency.
Organic oxygen absorber: Examples include ascorbic acid (vitamin C) and its salts, which utilize the reducing properties of ascorbic acid to undergo oxidation reactions with oxygen, achieving deoxygenation. This type of oxygen absorber generally offers good safety and antioxidant properties.

Working Principle
Chemical reaction: Primarily relies on the active ingredients undergoing chemical reactions with oxygen, consuming it and thereby reducing the oxygen content inside the packaging. This inhibits the growth of aerobic microorganisms, prevents food oxidation and rancidity, and extends the shelf life of food.
Oxygen absorption rate: Different types of oxygen absorbers have varying oxygen absorption rates. Iron-based oxygen absorbers have a relatively slow absorption rate but long duration, while sulfite-based oxygen absorbers absorb oxygen quickly, rapidly reducing oxygen levels in a short time.
Application Areas
Food industry: Widely used in the packaging of foods such as mooncakes, cakes, nuts, meat products, and tea. It prevents food from discoloration, off-flavors, and spoilage due to oxidation, inhibits the growth of microorganisms like mold and bacteria, and extends the shelf life of food.
Pharmaceutical industry: Used in the packaging of oxygen-sensitive medications, such as certain antibiotics and vitamin drugs, to prevent oxidation-induced degradation and ensure drug quality and efficacy.
Other fields: Also used in the packaging or preservation of electronic products, precision instruments, cultural relics, and archives to prevent damage caused by moisture, oxidation, or other factors.

Usage Precautions
Sealed storage: Unused oxygen absorbers should be stored sealed in a dry, cool environment to avoid premature失效 due to contact with air.
Not edible: The components in oxygen absorbers may be harmful to humans. Keep them away from children to prevent accidental ingestion.
Proper use: When using, select the appropriate dosage of oxygen absorber based on factors such as the volume of the packaged contents and oxygen content. Ensure the oxygen absorber is in full contact with the protected items to achieve the desired deoxygenation effect.