Soda lime self-indicating is a mixture of sodium hydroxide (NaOH), calcium hydroxide (Ca(OH)2), and a small amount of a dye. When CO2 is absorbed, the NaOH reacts with it to form sodium carbonate (Na2CO3). This reaction produces heat, which causes the dye to change color.
The color change of soda lime self-indicating is reversible. When the CO2 level is reduced, the Na2CO3 reacts with water to form NaOH again, and the dye changes back to its original color.
Soda lime self-indicating is available in a variety of colors, each of which indicates a different CO2 level. The most common colors are white, blue, and pink. White soda lime is used for general-purpose applications, while blue soda lime is used for applications where a high degree of accuracy is required. Pink soda lime is used for applications where the CO2 level needs to be monitored continuously.
Soda lime self-indicating is a safe and effective way to monitor CO2 levels. It is important to follow the manufacturer’s instructions for use and disposal.
Here are some of the safety precautions to take when using soda lime self-indicating:
- Wear gloves and eye protection when handling soda lime self-indicating.
- Avoid breathing in dust or mist from soda lime self-indicating.
- If soda lime self-indicating gets on your skin, wash it off immediately with soap and water.
- If soda lime self-indicating gets in your eyes, flush them with water for at least 15 minutes and seek medical attention immediately.
- Keep soda lime self-indicating out of reach of children and pets.
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