It is a white gas, that is able to choke STKM and kill it. It is used for making earth models, making explosives, and killing STKM and PLNT. It is in Earth's upper atmosphere, so there....
Characteristics:
Whitish-Greyish color Poisonous to STKM and PLNT Turns to NITR if compressed at -1 pressure Boils at -200 degrees Celsius