| Alcohols (273 tracked articles) |
| Aldehydes (49 tracked articles) |
| Amides (193 tracked articles) |
| Amidines (151 tracked articles) |
| Amines (422 tracked articles) |
| Anhydrides (1 tracked article) |
| Arsenicals (1 tracked article) |
| Aza Compounds (18 tracked articles) |
| Azides (1 tracked article) |
| Azo Compounds (2 tracked articles) |
| Boron Compounds (2 tracked articles) |
| Carboxylic Acids (247 tracked articles) |
| Carboxylic Acids (300 tracked articles) |
| Coordination Complexes (4 tracked articles) |
| Cyanates (4 tracked articles) |
| Dioxins and Dioxin-like Compounds (7 tracked articles) |
| Ethers (26 tracked articles) |
| Free Radicals (103 tracked articles) |
| Hydrazines (5 tracked articles) |
| Hydrocarbons (1,005 tracked articles) |
| Imides (4 tracked articles) |
| Imines (3 tracked articles) |
| Isocyanates (23 tracked articles) |
| Ketones (95 tracked articles) |
| Lactones (98 tracked articles) |
| Luciferins (3 tracked articles) |
| Nitrates (33 tracked articles) |
| Nitriles (21 tracked articles) |
| Nitrites (17 tracked articles) |
| Nitro Compounds (16 tracked articles) |
| Nitroso Compounds (8 tracked articles) |
| Onium Compounds (14 tracked articles) |
| Organometallic Compounds (21 tracked articles) |
| Organophosphorus Compounds (48 tracked articles) |
| Organoselenium Compounds (1 tracked article) |
| Organosilicon Compounds (11 tracked articles) |
| Quinones (46 tracked articles) |
| Sulfur Compounds (165 tracked articles) |
| Triazenes (3 tracked articles) |
| Volatile Organic Compounds (23 tracked articles) |