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Appendix 3: Examples of Incompatible Chemicals


Substances in the left hand column should be stored and handled so that they cannot accidentally come into contact with corresponding substances in the right hand column under uncontrolled conditions.

Chemical Incompatible with
acetic acid chromic acid, nitric acid, perchloric acid, peroxides, permanganates
acetic anhydride Hydroxyl-containing compounds such as ethylene glycol and perchloric acid
acetylene chlorine, bromine, copper, fluorine, silver, mercury
acetone concentrated nitric and sulfuric acid mixtures
alkali and alkaline earth metals water, carbon tetrachloride or other chlorinated hydrocarbons, carbon dioxide, halogens
ammonia (anhydrous) mercury, chlorine, calcium hypochlorite, iodine, bromine, hydrofluoric acid (anhydrous)
ammonium nitrate acids, powdered metals, flammable liquids, chlorates, nitrates, sulfur, finely divided organic or combustible materials
aniline nitric acid, hydrogen peroxide
arsenical materials any reducing agent
azides acids
bromine see chlorine
calcium oxide water
carbon (activated) calcium hypochlorite, all oxidizing agents
carbon tetrachloride sodium
chlorates ammonium salts, acids, powdered metals, sulfur, finely divided organic or combustible materials
chromic acid and chromium trioxide acetic acid, naphthalene, camphor, glycerol, alcohol, flammable liquids in general
chlorine ammonia, acetylene, butadiene, butane, methane, propane or other petroleum gases, hydrogen, sodium carbide, benzene, finely divided metals, turpentine
chlorine dioxide ammonia, methane, phosphine, hydrogen sulfide
copper acetylene, hydrogen peroxide
cumene hydroperoxide acids (organic and inorganic)
cyanides acids
flammable liquids ammonium nitrate, chromic acid, hydrogen peroxide, nitric acid, sodium peroxide, halogens
fluorine everything
hydrazine hydrogen peroxide, nitric acid, any other oxidant
hydrocarbons (e.g., propane, butane, benzene) fluorine, chlorine, bromine, chromic acid, sodium peroxide
hydrocyanic acid nitric acid, alkali
hydrofluoric acid (aqueous or anhydrous) ammonia (aqueous or anhydrous)
hydrogen peroxide copper, chromium, iron, most metals or their salts, alcohols, acetone, organic materials, aniline, nitromethane, combustible materials
hydrogen sulfide fuming nitric acid, oxidizing gases
hypochlorites acids, activated carbon
iodine acetylene, ammonia (aqueous or anhydrous), hydrogen
mercury acetylene, fulminic acid, ammonia
nitrates sulfuric acid
nitric acid (concentrated) acetic acid, aniline, chromic acid, hydrocyanic acid, hydrogen sulfide, flammable liquids, flammable gases, copper, brass, any heavy metals
nitrites acids
nitroparaffins inorganic bases, amines
oxalic acid silver, mercury
oxygen oils, grease, hydrogen, flammable liquids, solids, or gases
perchloric acid acetic anhydride, bismuth and its alloys, alcohol, paper, wood, grease, oils
peroxides, organic acids (organic or mineral), avoid friction, store cold
phosphorus (white) air, oxygen, alkalis, reducing agents
phosphorus pentoxide alcohols, strong bases, water
potassium carbon tetrachloride, carbon dioxide, water
potassium chlorate sulfuric and other acids
potassium perchlorate (also see chlorates) sulfuric and other acids
potassium permanganate glycerol, ethylene glycol, benzaldehyde, sulfuric acid
selenides reducing agents
silver and silver salts acetylene, oxalic acid, tartaric acid, ammonium compounds, fulminic acid
sodium carbon tetrachloride, carbon dioxide, water
sodium nitrite ammonium nitrate and other ammonium salts
sodium peroxide ethanol and methanol, glacial acetic acid, acetic anhydride, benzaldehyde, carbon disulfide, glycerin, ethylene glycol, ethyl acetate, methyl acetate, furfural
sulfides acids
sulfuric acid potassium chlorate, potassium perchlorate, potassium permanganate (and similar compounds of light metals such as sodium, lithium)
tellurides reducing agents


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