Dry ice is suitable for low temperature refrigeration because of its unique properties and characteristics. Dry ice is the solid form of carbon dioxide, which is a gas at room temperature and atmospheric pressure. It undergoes a process called sublimation, where it directly changes from a solid to a gas without becoming a liquid.

1. Low Temperature Properties:
Dry ice has a very low temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit). This makes it ideal for low temperature refrigeration applications where temperatures below the freezing point of water are required.

2. Sublimation:
When dry ice is exposed to room temperature or warmer conditions, it sublimates and releases carbon dioxide gas. This sublimation process results in a cooling effect, making dry ice an excellent refrigerant for maintaining low temperatures.

3. Cooling Efficiency:
Dry ice has a high cooling capacity due to its low temperature and the energy required for sublimation. It can absorb a significant amount of heat from its surroundings, making it effective for cooling and preserving perishable items.

4. Non-toxic and Inert:
Dry ice is non-toxic and does not produce any harmful fumes or residues when it sublimates. This makes it safe to use in food and medical applications where direct contact with the refrigerant is necessary.

5. Easy Handling:
Dry ice is available in solid form and can be easily handled without the need for specialized equipment. It can be shaped into different forms such as pellets, blocks, or slices, depending on the application requirements.

6. Limited Storage Life:
Dry ice has a relatively short storage life compared to traditional refrigerants. It gradually sublimes over time, so it needs to be used or replenished regularly to maintain its cooling effectiveness.

In conclusion, dry ice is suitable for low temperature refrigeration due to its low temperature properties, sublimation process, cooling efficiency, non-toxic nature, easy handling, and limited storage life. It is commonly used in various industries such as food preservation, medical storage, transportation of sensitive materials, and scientific research.