When certain hazardous chemicals are stored or mixed together, violent reactions may occur because the chemicals are unsuitable for mixing, or are incompatible. Classes of incompatible chemicals should be segregated from each other during storage, according to hazard class. Use the following general guidelines for hazard class storage:
Before mixing any chemicals, refer to this partial list and the chemicals' MSDS's
| CHEMICAL | INCOMPATIBLE CHEMICAL(S) |
|---|---|
| Acetic acid | aldehyde, bases, carbonates, hydroxides, metals, oxidizers, peroxides, phosphates, xylene |
| Acetylene | halogens (chlorine, fluorine, etc.), mercury, potassium, oxidizers, silver |
| Acetone | acids, amines, oxidizers, plastics |
| Alkali and alkaline earth metals | acids, chromium, ethylene, halogens, hydrogen, mercury, nitrogen, oxidizers, plastics, sodium chloride, sulfur |
| Ammonia | acids, aldehydes, amides, halogens, heavy metals, oxidizers, plastics, sulfur |
| Ammonium nitrate | acids, alkalis, chloride salts, combustible materials, metals, organic materials, phosphorous, reducing agents, urea |
| Aniline | acids, aluminum, dibenzoyl peroxide, oxidizers, plastics |
| Azides | acids, heavy metals, oxidizers |
| Bromine | acetaldehyde, alcohols, alkalis, amines, combustible materials, ethylene, fluorine, hydrogen, ketones (acetone, carbonyls, etc.), metals, sulfur |
| Calcium oxide | acids, ethanol, fluorine, organic materials |
| Carbon (activated) | alkali metals, calcium hypochlorite, halogens, oxidizers |
| Carbon tetrachloride | benzoyl peroxide, ethylene, fluorine, metals, oxygen, plastics, silanes |
| Chlorates | powdered metals, sulfur, finely divided organic or combustible materials |
| Chromic acid | acetone, alcohols, alkalis, ammonia, bases |
| Chromium trioxide | benzene, combustible materials, hydrocarbons, metals, organic materials, phosphorous, plastics |
| Chlorine | alcohol's, ammonia, benzene, combustible materials, flammable compounds (hydrazine), hydrocarbons (acetylene, ethylene, etc.), hydrogen peroxide, iodine, metals, nitrogen, oxygen, sodium hydroxide |
| Chlorine dioxide | hydrogen, mercury, organic materials, phosphorous, potassium hydroxide, sulfur |
| Copper | calcium, hydrocarbons, oxidizers |
| Hydroperoxide | reducing agents |
| Cyanides | acids, alkaloids, aluminum, iodine, oxidizers, strong bases |
| Flammable liquids | ammonium nitrate, chromic acid, hydrogen peroxide, nitric acid, sodium peroxide, halogens |
| Fluorine | alcohol's, aldehydes, ammonia, combustible materials, halocarbons, halogens, hydrocarbons, ketones, metals, organic acids |
| Hydrocarbons (Such as butane, propane benzene, turpentine, etc.) | acids, bases, oxidizers, plastics |
| Hydrofluoric acid | metals, organic materials, plastics, silica (glass), (anhydrous) sodium |
| Hydrogen peroxide | acetylaldehyde, acetic acid, acetone, alcohol's carboxylic acid, combustible materials, metals, nitric acid, organic compounds, phosphorous, sulfuric acid, sodium, aniline |
| Hydrogen sulfide | acetylaldehyde, metals, oxidizers, sodium |
| Hypochlorites | acids, activated carbon |
| Iodine | acetylaldehyde, acetylene, ammonia, metals, sodium |
| Mercury | acetylene, aluminum, amines, ammonia, calcium, fulminic acid, lithium, oxidizers, sodium |
| Nitrates | acids, nitrites, metals, sulfur, sulfuric acid |
| Nitric acid | acetic acid, acetonitrile, alcohol's, amines, (concentrated) ammonia, aniline, bases, benzene, cumene, formic acid, ketones, metals, organic materials, plastics, sodium, toluene |
| Oxalic acid | oxidizers, silver, sodium chlorite |
| Oxygen | acetaldehyde, secondary alcohol's, alkalis and alkalines, ammonia, carbon monoxide, combustible materials, ethers, flammable materials, hydrocarbons, metals, phosphorous, polymers |
| Perchloric acid | acetic acid, alcohols, aniline, combustible materials, dehydrating agents, ethyl benzene, hydriotic acid, hydrochloric acid, iodides, ketones, organic material, oxidizers, pyridine |
| Peroxides, organic | acids (organic or mineral) |
| Phosphorus (white) | oxygen (pure and in air), alkalis |
| Potassium | acetylene, acids, alcohols, halogens, hydrazine, mercury, oxidizers, selenium, sulfur |
| Potassium chlorate | acids, ammonia, combustible materials, fluorine, hydrocarbons, metals, organic materials, sugars |
| Potassium perchlorate (also see chlorates) | alcohols, combustible materials, fluorine, hydrazine, metals, organic matter, reducing agents, sulfuric acid |
| Potassium permanganate | benzaldehyde, ethylene glycol, glycerol, sulfuric acid |
| Silver | acetylene, ammonia, oxidizers, ozonides, peroxyformic acid |
| Sodium | acids, hydrazine, metals, oxidizers, water |
| Sodium nitrate | acetic anhydride, acids, metals, organic matter, peroxyformic acid, reducing agents |
| Sodium peroxide | acetic acid, benzene, hydrogen sulfide metals, oxidizers, peroxyformic acid, phosphorous, reducers, sugars, water |
| Sulfides | acids |
| Sulfuric acid | potassium chlorates, potassium perchlorate, potassium permanganate |
References:
Material Safety Data Sheets, various chemical companies.
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