| Chemical | Incompatible With These Chemicals |
| Acetic acid | Chromic acid, nitric acid, hydroxyl compounds, ethylene glycol, perchloric acid, peroxides, permanganates |
| Acetic anhydride | Hydroxyl-containing compounds such as ethylene glycol, perchloric acid |
| Acetone | Concentrated nitric and sulfuric acid mixtures, hydrogen peroxide |
| Acetylene | Chlorine, bromine, copper, fluorine, silver, mercury |
| Alkali and alkaline earth metals such as powdered magnesium, sodium, potassium | Water, carbon tetrachloride or other chlorinated hydrocarbons, carbon dioxide, halogens |
| Ammonia (anhydrous) | Mercury, halogens, calcium hypochlorite, hydrofluoric acid |
| Ammonium nitrate | Acids, metal powders, flammable liquids, chlorates, nitrites, sulfur, finely divided organic or combustible materials |
| Aniline | Nitric acid, hydrogen peroxide |
| Arsenical materials | Any oxidizer agent |
| Azides | Acids, heavy metals and their salts, oxidizing agents |
| Calcium oxide | Water |
| Carbon, activated | All oxidizing agents, calcium hypochlorite |
| Carbon tetrachloride | Sodium |
| Chlorates | Ammonium salts, acids, metal powders, sulfur, finely divided organic or combustible material |
| Chlorine dioxide | Ammonia, methane, phosphine, hydrogen sulfide |
| Chromic acid and chromium trioxide | Acetic acid, alcohol, camphor, glycerol, naphthalene, flammable liquids in general |
| Copper | Acetylene, hydrogen peroxide |
| Cumene hydroperoxide | Acids (organic or inorganic) |
| Cyanides | Acids |
| Flammable liquids | Ammonium nitrate, chromic acid, hydrogen peroxide, nitric acid, sodium peroxide, halogens, other oxidizing agents |
| Fluorine | All other chemicals |
| Hydrides | Water |
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