Moisture absorber refills in different states have different components. The commonly used types of moisture absorber refills are:

1. Solid-state moisture absorber refill
(1) Silicone
Silica gel is silicic acid gel, which is a highly active adsorption material. The main component is silicon dioxide. It has an open porous structure and strong adsorption. It can be used for gas drying, gas absorption, liquid dehydration, and chromatography analysis.
(2) Calcium chloride
Calcium chloride is a salt composed of chlorine element and calcium element. The chemical formula is CaCl2. It is slightly bitter and tasteless. Stored anhydrous calcium chloride.

2. Liquid moisture absorber refill
(1) Lithium chloride
Lithium chloride is highly hygroscopic, and one molecule of lithium chloride can be closely combined with at least two molecules of water. When the lithium chloride solution reaches a humidity balance with the air with a humidity of 90%, one molecule of lithium chloride can absorb approximately 26 water molecules.
(2) Lithium Bromide
The molecular formula of lithium bromide is LiBr. Anhydrous lithium bromide is a white cubic crystal or granular powder, which is easily soluble in water. The lithium bromide aqueous solution formed by the reaction with water is a colorless liquid with a salty taste, non-toxic, neutral or slightly alkaline. 

3. The gas moisture absorber refill is generally compressed air, which reduces its volume and increases its pressure. By mixing with moist air, the purpose of diluting and dehumidifying the moist air is realized.