Compound

Solubility parameter δ (cal/cm³)^1/2

Solubility parameter δ (MPa^1/2)

Ammonia (NH₃)

13.2

27.2

Carbon dioxide (CO₂)

10.7

22

Nitrous oxide (N₂O)

10.6

21.8

Xenon (Xe)

9.5

19.5

Propane (C₃H₈)

8.1

16.7

n-Hexane (C₆H₁₄)

7.0

14.4