Dry ice is solid carbon dioxide, at room temperature and pressure of 6079.8 kPa pressure, the condensation of carbon dioxide into a colorless liquid, then quickly evaporated at low pressure, it condenses into a solid block of compressed snow and ice-like substance, its temperature It was minus 78.5 ℃, which is dry ice. Dry ice storage is 1.5 times higher than water ice, carbon dioxide absorbs heat into the gas after the distillation, no residue, no toxic, no smell, there is sterilization. It is not heated by the liquefaction, gasification and direct. Dry ice is solid carbon dioxide, due to dry ice temperature is very low, negative 78.5 degrees Celsius, it is often used to keep objects maintain the cold or low temperature. 

 Dry ice to prevent evaporation and explosion should be stored 

 Also known as solid carbon dioxide ice (co2), highly volatile to the level of non-toxic, tasteless, more than 1000 times the solid area of ??the gas carbon dioxide, so the ice can not be stored in sealed performance, smaller containers, it is easy to violence fried. Good air circulation to make the dry ice on the place, so that the dry ice out of the release of volatile gases produced, so the safe. 

 Storage of dry ice to use a dedicated storage tank, but expensive, the average family is not a dedicated box, you can use ordinary foam boxes to storage. 

 In addition, non-essential so as not to a complete cut into small pieces or particles of dry ice, cut into small pieces of dry ice will be more than a block of dry ice to sublimate easily. 

 Do not bare ice in the refrigerator or freezer. If the ice directly on the refrigerator without packaging or cold storage, refrigerator or cold storage temperature regulator will think the temperature is too low to be closed, which will sacrificed the life of the refrigerator. Of course, if in case of power failure the refrigerator or cold storage of dry ice will definitely maintain a good under low temperature, but evaporation of carbon dioxide gas out of the refrigerator too much can cause an explosion. 

 The use of dry ice 

 Use can be divided into direct and indirect cooling cooling method. 

 ● Even if the direct cooling method used in direct contact with items that will not go wrong. For example, frozen fish, frozen food, ice cream storage, transportation, preservation remains. Dry ice can be installed directly regulate cooling and other devices, artificial regulation of dry ice sublimation temperature. In other words, when the dry ice into carbon dioxide gas if you do not tend to spread, you can adjust the appropriate cooling temperature. 

 ● indirect cooling effect of carbon dioxide sensitive method for the storage of goods, transport. Such as: raw fish, vegetables and fruits. Indirect cooling method for the indirect cooling medium.