Dry ice is made by liquefying carbon dioxide into colorless liquid under the pressure of 6250.5498kPa, and then rapidly solidifying at low temperature. Dry ice has been widely used in many fields.

The history of dry ice can be traced back to 1823 Faraday and Derby in England. They liquefied carbon dioxide for the first time, and then Chirolet of Germany successfully produced solid carbon dioxide at 1834. But it was only used for research at that time and was not widely used.

The United States established the successful industrialized mass production of dry ice in 1925. At that time, the name of the finished product was dry ice, but its official name was solid carbon dioxide. 1928, Japan obtained the manufacturing and sales rights from dry ice co., ltd, and established Japan dry ice co., ltd, the predecessor of showa carbonic acid co., ltd.

Matters needing attention in storing dry ice

1. Select a suitable storage container.

Because the temperature of dry ice is extremely low, ordinary containers cannot be used at room temperature, and special heat preservation containers should be selected. At the same time, the material of the container should have the characteristics of low temperature resistance, moisture resistance and leakage prevention.

2. Pay attention to the storage environment

The storage environment of dry ice should be kept dry, cool and well ventilated. Avoid direct sunlight to avoid increasing the evaporation rate on the surface of dry ice. At the same time, avoid mixing with acidic substances and oxidants to avoid danger.

3. Pay attention to the storage quantity.

The quantity of stored dry ice should be determined according to the volume of the container and the density of dry ice. Too much dry ice will cause the temperature in the container to be too low, resulting in safety hazards.

The above contents refer to Baidu Encyclopedia-Dry Ice.