Hazards of Dry Ice
Dry ice is the solid form of carbon dioxide. It is non-combustible and is available in flakes, pellets, or block form. Dry ice will sublime (vaporizes directly to the gas state) at a temperature of -78.5 C (-109.3 F) or higher.
Dry ice is commonly used to cool reactions or to ship biological specimens.
Dry ice is considered hazardous three reasons: