Substance

Critical Temperature

Critical Point Density

Critical Pressure

˚C

g/mL

atm

CO₂

31.3

0.47

72.9

N₂O

36.5

0.45

71.7

F₆S

45.6

0.74

37.1

NH₃

132.5

0.24

112.5

n-butane

152.0

0.23

37.5

H₂O

374

0.32

217.7