Dry ice is very volatile at room temperature. How can it be stored for a long time?

First of all, we should know what dry ice is. Dry ice is carbon dioxide in solid form. It absorbs heat at minus 78.5 degrees Celsius and sublimates into gas form. The gas after sublimation is nontoxic and tasteless. When the gas at low temperature meets air at room temperature, it will liquefy and form white fog, which is very dreamy and beautiful.

the main purpose of dry ice is to be used as refrigerant and coolant, and it can also be used for artificial rain making.

The advantages of dry ice are ultra-low temperature and small size, and its cooling effect is better than that of ice. Moreover, dry ice will not produce too much water like ice during sublimation. At the same time, dry ice also has the function of sterilization, which has a good bacteriostatic effect on the bacterial reproduction of food and can effectively ensure the freshness of food.

regression problem, how to preserve dry ice for a long time?

the first method: dry ice must be stored in a professional storage box. In a professional freezing storage box, dry ice can be stored for 5 to 11 days. After the storage period exceeds, dry ice will condense together to form an ice mass, or even change from solid to gas, and the effect and function of dry ice will be greatly reduced.

Therefore, it is suggested that after each use, the remaining dry ice should be put into the storage box in time for preservation.

the second method: because professional storage boxes are expensive, ordinary families don't have such professional boxes, so ordinary families can use foam boxes to store them. Remember that it is best to store them as a whole, which will slow down the unnecessary gasification of a lot of dry ice and facilitate longer storage.

There are several points for attention when using dry ice:

First, remember not to touch dry ice directly with your hands, because dry ice is extremely low temperature, and direct contact with dry ice for a long time will frostbite human epidermis.

second, it is important to remember that dry ice should not be stored in a container with small volume and strong sealing, because dry ice can easily be gasified to generate gas with an area 1111 times larger than that of a solid, and it is easy to generate greater pressure on a container with small volume and strong sealing.

Thirdly, if there are no professional storage measures, it is suggested to directly dispose of it in a safe place and let it evaporate, so as to avoid dangerous discovery caused by improper storage.