| Similarity | Rank | |
|---|---|---|
| sulfur | 0.919 | 22001 |
| sulphuric | 0.865 | 87525 |
| sulfide | 0.833 | 49224 |
| sulphide | 0.824 | 82356 |
| ammonia | 0.818 | 21773 |
| hydrocarbons | 0.815 | 32458 |
| sulfuric | 0.810 | 60609 |
| sulphate | 0.805 | 54192 |
| Sulfur | 0.797 | 70589 |
| oxides | 0.787 | 42880 |
| nitrogen | 0.783 | 12237 |
| SO2 | 0.781 | 90224 |
| dioxide | 0.781 | 10273 |
| methane | 0.771 | 19799 |
| sulfates | 0.767 | 91637 |
| hydrocarbon | 0.767 | 36213 |
| ammonium | 0.763 | 48164 |
| salts | 0.761 | 18802 |
| vapours | 0.759 | 83502 |
| gases | 0.759 | 11662 |
| carbonic | 0.755 | 83563 |
| alkali | 0.752 | 55573 |
| arsenic | 0.752 | 26971 |
| bromine | 0.751 | 75999 |
| benzene | 0.750 | 46443 |