Dry ice is extremely volatile at room temperature. How can we store dry ice for a long time?

First of all, you need to know what dry ice is. Dry ice is carbon dioxide in solid form. It absorbs heat and sublimates into a gas form at minus 78.5 degrees Celsius. The sublimated gas is non-toxic and tasteless. When the low-temperature gas encounters normal temperature air, it When liquefied, it will form a white mist, which is very dreamy and beautiful.

The main use of dry ice is as a refrigerant and coolant, and it can also be used for artificial rainmaking.

The advantages of dry ice are ultra-low temperature and small size. The cooling effect is better than that of ice cubes. In addition, dry ice does not produce too much water like ice cubes during the sublimation process. At the same time, dry ice also has sterilization properties. It has a very good antibacterial effect on the bacterial growth of food, and can also effectively ensure the freshness of food.

Back to the question, 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 a shelf life of 5 to 10 days. After the shelf life exceeds, the dry ice will condense. Forming ice masses together, or even changing from solid to gas, the effectiveness and role of dry ice will be greatly reduced.

So it is recommended that after each use, the remaining dry ice must be promptly placed in a storage box for storage.

Second method: Because professional storage boxes are relatively expensive, ordinary families will not have such professional boxes, so ordinary families can use foam boxes for storage. Remember that it is best to store them whole. Stored in blocks, this will slow down a lot of unnecessary vaporization of dry ice and facilitate longer storage.

There are several precautions when using dry ice:

First, remember not to touch dry ice directly with your hands, because dry ice is ultra-low temperature, and the human body is directly exposed to dry ice for a long time. Will frostbite the epidermal tissue of the human body.

Secondly, remember not to store dry ice in small and tightly sealed containers, because dry ice can easily vaporize to produce a gas that is a thousand times larger than the solid form, which can easily damage small and tightly sealed containers. Stronger containers generate greater pressure.

Third, if there are no more professional storage measures, it is recommended to discard it directly in a safe place and let it evaporate on its own to avoid dangerous discoveries caused by improper storage.