Answer:
Yes, the clumping and hardening you observe in the oxygen absorber during use is entirely normal. In fact, it is a direct sign that the absorber is actively and effectively doing its job.
Here’s why:
- Oxygen Absorption Reaction Begins:?Once placed inside a food packaging bag, the oxygen absorber immediately begins working to absorb free oxygen. This creates and maintains a low-oxygen environment, protecting the food’s quality.
- Core Component Transformation:?During this process, the key active ingredient in the absorber –?reduced iron powder?– undergoes a chemical reaction with oxygen. It oxidizes to form?iron oxide. This oxidation is the core chemical reaction responsible for oxygen removal.
- Cause of Clumping/Hardening:?As the reduced iron powder oxidizes, its physical state changes. Simultaneously, the iron oxide produced during oxidation binds tightly with other auxiliary components in the absorber’s formulation (such as silica gel and activated carbon). This physical and chemical binding between components causes the overall structure of the absorber to become dense and hard, forming clumps.
Conclusion:
Therefore, the clumped and hardened state of the food oxygen absorber after use is a?natural and expected physicochemical change. It occurs because the active ingredients (like the iron powder) have successfully completed the