SimilarityRank
sulphur 0.850 6647
dioxide 0.848 4762
nitrous 0.847 29606
tetrachloride 0.845 38419
phosgene 0.838 98640
carbon 0.834 3195
oxide 0.829 7892
benzene 0.823 21692
methane 0.822 11786
nitric 0.818 22052
hexafluoride 0.817 78594
hydrochloric 0.804 22757
phenol 0.794 28644
nitrogen 0.790 6386
&sub2; 0.789 34174
chlorine 0.789 10537
ethane 0.783 70857
nox 0.778 28969
hydrocarbon 0.777 12320
particulate 0.776 25930
trioxide 0.774 83599
halon 0.772 27495
sulphuric 0.772 21898
vocs 0.770 67555
ammonia 0.769 10958