Dry ice is solid carbon dioxide at room temperature and pressure of 6079.8 kPa. The carbon dioxide is condensed into a colorless liquid, and then evaporated rapidly under low pressure, and then condensed into pieces of compacted ice-snow-like solid matter. Its temperature is minus 78.5 degrees Celsius, which is dry ice. Dry ice storage is more than 1.5 times that of water ice. After absorbing heat, it sublimates into carbon dioxide gas, without any residue, non-toxicity, no peculiar smell, and has sterilizing effect. It does not liquefy after being heated, but directly vaporizes. Dry ice is a solid form of carbon dioxide, due to its very low temperature. The temperature is minus 78.5 degrees Celsius, so it is often used to keep objects in a frozen or cryogenic state.

1. The storage of dry ice should prevent volatilization and explosion

Dry ice, also known as solid carbon dioxide (CO2), is extremely volatile and sublimates into non-toxic, odorless gaseous carbon dioxide 1,000 times larger than the solid area. Therefore, dry ice cannot be stored in containers with good airtightness and small volume, as it is easy to explode. It is safe to place the dry ice in a place with good air circulation so that the gas produced by the volatilization of the dry ice is released. To store dry ice, a special storage box is required, but it is expensive, and ordinary families do not have a special box, so ordinary foam boxes can be used for storage. In addition, try not to cut a complete piece of dry ice into small pieces or granules if it is not necessary, because the dry ice cut into small pieces will sublimate more easily than a whole piece of dry ice.

2. Do not store dry ice in the refrigerator or freezer exposed

Because if the dry ice is placed directly in the refrigerator or cold storage without packaging, the temperature regulator of the refrigerator or cold storage will mistakenly think that the temperature is too low and be turned off, which will damage the life of the refrigerator. Of course, dry ice will definitely keep the refrigerator or cold storage at a good low temperature in the event of a power outage, but too much carbon dioxide gas volatilized will also cause the refrigerator to explode.

3. It is forbidden to touch and enter with hands! ! !

Since it can cause frostbite, wrap it in a cloth or newspaper before handling it. Please wrap the dry ice in a cloth or newspaper. In this way, the sublimation rate of the dry ice itself will be inhibited, thereby prolonging the cooling time.

4. It is forbidden to seal dry ice in bottles and other containers. After dry ice turns into gas, the volume will increase by 750 times. Putting it into a container and sealing it will cause the container to burst.

5. When cutting dry ice, it is necessary to cut from the middle when cutting dry ice. Pay attention to the lack of oxygen in places where a large amount of dry ice is placed. Frequent ventilation is required when using large quantities of dry ice in closed rooms. For a small amount of dry ice storage, it is recommended to use an ordinary foam incubator to store dry ice; if you want to minimize the gasification of dry ice, it is recommended that you use a high-quality, high-density, thickened foam incubator to store dry ice. To effectively reduce the loss of dry ice, it is very effective to store dry ice in a special storage box for dry ice. If you want to store dry ice for a longer period of time, there is no special way. As far as the current conditions are concerned, use storage with better heat preservation effect If you have a very small amount of dry ice, it can't be stored for that long.

Storage of dry ice

Dry ice, also known as solid carbon dioxide (CO2), is extremely volatile and sublimates into non-toxic, odorless gaseous carbon dioxide 1000 times larger than the solid area. Therefore, dry ice cannot be stored in containers with good airtightness and small volume, as it is easy to explode. It is safe to place the dry ice in a place with good air circulation so that the gas produced by the volatilization of the dry ice is released.

To store dry ice, you need to use a special storage box, but there is still loss. A good storage box can reduce the loss to 6‰. But the price is expensive. General families do not have special boxes, and ordinary foam boxes can be used for storage. In addition, try not to cut a complete piece of dry ice into small pieces or granules if it is not necessary, because the dry ice cut into small pieces will sublimate more easily than a whole piece of dry ice. Do not store dry ice exposed in the refrigerator or freezer. Because if the dry ice is placed directly in the refrigerator or cold storage without packaging. The temperature regulator of the refrigerator or cold storage will be turned off by mistakenly thinking that the temperature is too low, which will reduce the life of the refrigerator. Of course, dry ice will definitely keep the refrigerator or cold storage at a good low temperature in the event of a power outage. But too much carbon dioxide gas can cause the refrigerator to explode. After each use, be sure to remove the remaining dry ice from the machine and put it in the freezer. After the storage period, the dry ice begins to form ice clusters or even vaporize, and the use effect will be significantly reduced. Dry ice consumes a lot within 24 hours due to sublimation, and the losses caused by these sublimations are also ubiquitous. Therefore, it is best to purchase dry ice before it is used, so as to shorten the time interval between purchasing dry ice and actually using it as much as possible.