| RGN | Reactivity Group | Incompatible With RGN: |
| 1 | Acids, Mineral, Non-Oxidizing | 4-15,17-26,28,30-34,101-107 |
| 2 | Acids, Mineral, Oxidizing | 3-34,101-103,105-107 |
| 3 | Acids, Organic | 2,4,5,7,8,10-12,15,18,21,22,24,265,33,34, 102-105,107 |
| 4 | Alcohols and Glycols | 1-3,8,18,21,25,30,34,104,105,107 |
| 5 | Aldehydes | 1-3,7,8,10,12,21,25,27,28,30,33,34,104,105, 107 |
| 6 | Amides | 1,2,21,24,104,105,107 |
| 7 | Amines, Aliphatic and Aromatic | 1-3,5,12,17,18,21,24,30,34,104,105, 107 |
| 8 | Azo Compounds, Diazo Compounds and Hydrazines | 1-5,9,11-13,17-23,25,30-34, 102-107 |
| 9 | Carbamates | 1,2,8,10,21,22,25,30,104, 107 |
| 10 | Caustics | 1-3,5,9,13,17-19,21,22,24-27,32,34,102,103, 107 |
| 11 | Cyanides | 1-3,5,9,13,17-19,21,22,24-27,32,34,102,103, 107 |
| 12 | Dithiocarbamates | 1-3,8,17-19,21,25,30,34,103,104, 107 |
| 13 | Esters | 1,2,8,10,21,25,102,104,105, 107 |
| 14 | Ethers | 1,2,104, 107 |
| 15 | Fluorides, Inorganic | 1-3, 107 |
| 16 | Hydrocarbons, Aromatic | 2,104, 107 |
| 17 | Halogenated Organics | 1,2,7,8,10,11,20-23,25,30,104,105, 107 |
| 18 | Isocyanates | 1-4,7,8,10-12,20-22,25,30,31,33, 104-107 |
| 19 | Ketones | 1,2,8,10,11,20,21,25,30,104,105, 107 |
| 20 | Mercaptons and Other Organic Sulfides | 1,2,8,17-19,21,22,25,30,34,104,105, 107 |
| 21 | Metals, Alkali and Alkaline Earth Elemental | 1-13,17-20,25-27,30-32,34,101-104,106, 107 |
| 22 | Metals, Other Elemental and Alloys as Powders, Vapors or Sponges | 1-3,8-10,17,18,20,28,30,34,102-104,106, 107 |
| 23 | Metals, Other Elemental and Alloys as Sheets, Rods, Drops, Moldings | 1,2,8,17,102-104, 107 |
| 24 | Metal and Metal Compounds, Toxic | 1-3,6,7,10,26,30,34,102,103,106, 107 |
| 25 | Nitrides | 1-5,8-13,17-21,26-27,30,31,34,101-104,106, 107 |
| 26 | Nitrites | 1-3,10,21,24,25,30,104,105, 107 |
| 27 | Nitro Compounds, Organic | 2,5,10,21,25,104,105, 107 |
| 28 | Hydrocarcons, Aliphatic, Unsaturated | 1,2,5,22,30,104, 107 |
| 29 | Hydrocarbons, Aliphatic, Saturated | 2,104, 107 |
| 30 | Peroxides and Hydroperoxides, Organic | 1,2,4,5,7-9,11,12,17-22,24-26,28,31-34,101-105, 107 |
| 31 | Phenols and Cresols | 1,2,8,18,21,25,30,34,102-105, 107 |
| 32 | Organophosphates, Phosphothioates, Phosphodithioates | 1,2,8,10,21,30,34,104,105, 107 |
| 33 | Sulfides, Inorganic | 1-3,5,8,18,30,34,102-104,106, 107 |
| 34 | Epoxides | 1-5,7,8,10-12,20-22,24,25,30-33,102,104,105, 107 |
| 101 | Combustible and Flammable Materials, Misc. | 1,2,21,25,30,102,104,105, 107 |
| 102 | Explosives | 1-3,8,10,13,21-25,30,31,33,34,101,105-105, 107 |
| 103 | Polymerizable Compounds | 1-3,8,10-12,21-25,30,31,33,102,104,105, 107 |
| 104 | Oxidizing Agents, Strong | 1,3-9,11-14,16-23,25-34,101-103,105, 107 |
| 105 | Reducing Agents, Strong | 1-8,12,13,17-20,26,27,30,31,32,34,101-104,106, 107 |
| 106 | Water and Mixtures Containing Water | 1,2,8,18,21,22,24,25,33,105, 107 |
| 107 | Water Reactive Substances | ALL! |
