Functions of color-changing silica gel

1. Moisture absorption and rust prevention: Color-changing silica gel is mainly used for moisture absorption and rust prevention of instruments, meters, equipment, etc. in closed conditions. It keeps the equipment dry by absorbing water vapor in the environment, thereby preventing rust.

2. Humidity indication: A notable feature of color-changing silica gel is that its color changes with the amount of moisture absorbed, usually gradually changing from blue to light red. This color change can intuitively indicate the relative humidity of the environment, helping users to understand and take appropriate moisture-proof measures in a timely manner.

3. Use with: Color-changing silica gel can also be used with ordinary silica gel desiccant to indicate the moisture absorption degree of the desiccant and the relative humidity of the environment through color changes.

4. Desiccant for packaging: As a silica gel desiccant for packaging, color-changing silica gel is widely used for moisture-proof protection of precision instruments, leather, shoes, clothing, food, medicines and household appliances.

Source and characteristics:

The main component of color-changing silica gel is cobalt chloride, which is highly toxic, but has a strong adsorption effect on water vapor in the air. Its color change is achieved by changing the amount of crystal water contained in the cobalt chloride. It is a high-grade adsorption desiccant.