will turn into DRIC (Dry Ice) when it's cold enough.
DRIC
Solid form of CO2
CONV
open the console, type in !set ctype conv fire now put any kind of element as long as it touches CONV near it. When GAS touches CONV the GAS will be converted into FIRE.
BUBW
Carbonated Water efficiently puts out fires (than WATR) will release WTRV & CO2 if hot enough