1.Lead
2 Arsenic
3 Ammonia
4 Benzene
4 Hydrogen Cyanide
5 Formaldehyde
6 Nicotine-bug repellent
7 carbon monoxide
8 cadmium
9 Chromium
10 Butane
11 Acetic acid
12 Methanol
13 Acetone
14 Stearic acid
15 Heamine
16 Radon
17 Hexanal
18 Toluene
19 Nerol
20 Tartaric Acid
