Description

Liquid and solid carbon dioxide are important refrigerants, especially in the food industry, where they are employed during the transportation and storage of ice cream and other frozen foods. Solid carbon dioxide is called "dry ice" and is used for small shipments where refrigeration equipment is not practical. Solid carbon dioxide is always below − *8.5 ° C at regular atmospheric pressure, regardless of the air temperature. 

Liquid carbon dioxide (industry nomenclature R**4 or R***4) was used as a refrigerant prior to the discovery of R**2 and may enjoy a renaissance due to the fact that R**4a contributes to climate change. Its physical properties are highly favorable for cooling, refrigeration, and heating purposes, having a high volumetric cooling capacity. Due to its operation at pressures of up to **0 bar (***0 psi), CO2 systems require highly resistant components that have already been developed for mass production in many sectors. In automobile air conditioning, in more than *0% of all driving conditions for latitudes higher than *0° , R**4 operates more efficiently than systems using R**4a. Its environmental advantages (GWP of 1, non-ozone depleting, non-toxic, non-flammable) could make it the future working fluid to replace current HFCs in cars, supermarkets, hot water heat pumps, among others. 

PROPERTIES
CO2
CAS Number: *******9
Colour: Colourless 
Odor: Odorless 
Appearance: Colourless and not turbid

Chemical name:     Carbon dioxide 
Chemical formula: CO2
Molecular weight: *4
Melting point, ° C: − *6.6
Density: **0 kg/m3 (liquid at *6 atm and *0 ° C)
Vapor pressure:     5.*3 MPa (*0 ° C)
Solubility in water    1.*5 g/L at *5 ° C, **0 kPa
Acidity (pKa)    6.*5, *0.*3
Viscosity    0.*7 cP at − *8.5 ° C
Specific heat capacity C    *7.**5 J/K mol

ODP     0
GWP     1

Specification: 
Carbon Dioxide ≥ *9.9 %v/v
Water content ≤ *0 ppm w/w
Oxygen ≤ *0 ppm v/v
Nitrogen ≤ *0 ppm v/v
Hydrogen≤ 5 ppm v/v
Argon ≤ 1 ppm v/v
Halogen (as Cl) ≤ 0.5 ppm w/w
Total hydrocarbons ≤ *0 ppm v/v
Total Sulphur ≤ 0.1 ppm v/v
Non volatile residue ≤ *0 ppm w/w
Acidity: Pass