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The following chemicals, listed in the left column, should not be used with chemicals listed in the right column, except under specially controlled conditions. Chemicals in the left column should not be stored in the immediate area with chemicals in the right column. Incompatible chemicals should always be handled, stored or packed so that they cannot accidentally come into contact with one another. This list is representative of chemical incompatibilities and is not complete, nor are all incompatibilities shown. | Chemical | Keep out of contact with: | | Alkaline metals, such as powdered aluminum, magnesium, sodium, potassium, etc. | Carbon tetrachloride or other chlorinated hydrocarbons, carbon dioxide and water | | Acetic Acid | Chromic acid, nitric acid, hydroxyl compounds, ethylene glycol, perchloric acid, peroxides and permanganates | | Acetylene | Chlorine, bromine, copper, fluorine, silver and mercury | | Ammonia | Mercury, chlorine, calcium hypochlorite, iodine, bromine and hydrofluoric acid | | Ammonium nitrate | Acids, metal powders, flammable liquids, chlorates, nitrites, sulfur, finely divided organic or combustible materials | | Carbon, activated | Calcium hypochlorite | | Copper | Acetylene and hydrogen peroxide | | Chromic acid | Acetic acid, naphthalene, camphor, glycerin, turpentine, alcohol and flammable liquids | | Chlorine | Ammonia, acetylene, butadiene, butane, methane, propane, hydrogen, sodium carbide, turpentine, benzene and finely divided metals | | Cyanides | Acids - organic or inorganic | | Hydrogen peroxide | Copper, chromium, iron, most metals, alcohols, acetone, organic materials, aniline, nitromethane, flammable liquids and combustible materials | | Hydrogen sulfide | Fuming nitric acid and oxidizing gases | | Hydrocarbons (butane, propane, benzene, gasoline, turpentine etc.) | Fluorine, chlorine, bromine, chromic acid and sodium peroxide | | Iodine | Acetylene, ammonia and hydrogen | | Nitric acid | Acetic acid, aniline, chromic acid, hydrocyanic acid, hydrogen sulfide, flammable liquids, flammable gases, copper, brass and any heavy metals | | Perchloric acid | Acetic anhydride, bismuth and its alloys, alcohol, paper, wood, ether, oils and grease | | Phosphorous | Oxidizing agents, oxygen, strong bases | | Potassium chlorate | Sulfuric and other acids | | Potassium permanganate | Glycerin, ethylene glycol, benzaldehyde and sulfuric acid | | Sodium | Carbon tetrachloride, carbon dioxide and water | | Sodium nitrite | Ammonium nitrate and other ammonium salts | | Sodium peroxide | Ethyl or methyl alcohol, glacial acetic acid, acetic anhydride, benzaldehyde, carbon disulfide, glycerin, ethylene glycol, ethyl acetate, methyl acetate and furfural | | Sulfides, inorganic | Acids Sulfuric acid Potassium chlorate, potassium perchlorate and potassium permanganate |
Special Segregation of Incompatible Chemicals
In addition to the segregation noted above, dangerously incompatible substances, even in small quantities, should not be stored next to each other on shelves or in such a position that accidental rupture of containers may allow mixing. For example: | Chemical | Keep out of contact with: | | Chlorine | Acetylene | | Chromic acid | Ethyl alcohol | | Oxygen (compressed, liquefied) | Propane | | Sodium | Chloroform and aqueous solutions | | Nitrocellulose (wet, dry) | Phosphorous | | Potassium permanganate | Sulfuric acid | | Perchloric acid | Acetic acid | | Sodium chlorate | Sulfur in bulk |
Oxidizing agents are incompatible with reducing agents. | Oxidizing Agents | Reducing Agents | | Chlorates | Ammonia | | Chromates | Carbon | | Dichromates | Metals | | Chromium trioxide | Metal hydrides | | Halogens | Nitrates | | Halogenating agents | Organic Compounds | | Hydrogen peroxide | Phosphorus | | Nitric acid | Silicon | | Nitrates | Sulfur | | Perchlorates | | | Peroxides | | | Permanganates | | | Persulfates | |
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