Deacidification agent is an oxygen scavenger.

Function: Preservation and mildew prevention.

The main raw material of this product is Guyuan iron oxide.

This product begins to react when it encounters oxygen. It must be used up within 1.5 hours after unsealing. The shorter the time, the better the effect. It cannot be reused.

Acid-oxygen actually means oxygen scavenger (deacidification agent)

Generally speaking, oxygen scavenger (FreshPac) is also called deoxidizer or desiccant. The common desiccants are as follows: Fe (iron, pure iron is silvery white, common pig iron is black; solid, mostly in block form, when used as desiccant, it is powdery), CaO (calcium oxide, also called quicklime) , white, solid, mostly in powder form), NaOH (sodium hydroxide is also called fire soda, caustic soda, caustic soda, white, solid, mostly in powder form), etc. Desiccant in food is generally Fe or CaO.

So the above-mentioned black powdery solid should be Fe. The principle is: Fe reacts with water vapor and oxygen to form iron hydrate (generally written as: 4Fe 3O2=2Fe2O3).