ATTACHMENT A – INCOMPATIBLE CHEMICALS

Subject Matter Expert: Al Buerer
GN470094, Issue E
Revision Date: October 31, 2008; Replaces Document Dated: October 16, 2007

Classes of Incompatible Chemicals^a:

Class A	Class B
Acids	Bases
Alkali and alkaline earth metals Carbides Hydrides Hydroxides Oxides Peroxides	Water Acids Halogenated organic compounds Oxidizing agents^b Chromates, dichromates, CrO₃ Halogens Halogenating agents Hydrogen peroxide and peroxides Nitric acid, nitrates Perchlorates and chlorates Permanganates Persulfates
Inorganic azides	Acids Heavy metals and their salts Oxidizing agents^b
Inorganic cyanides	Acids, strong bases
Inorganic nitrates	Acids Metals Nitrites Sulfur
Inorganic nitrites	Acids Oxidizing agents^b
Inorganic sulfides	Acids
Organic compounds Organic acyl halides Organic anhydrides Organic halogen compounds Organic nitro compounds	Oxidizing agents^b Bases Organic hydroxy compounds Bases Organic hydroxy compounds Aluminum metal Strong bases
Powdered metals	Acids Oxidizing agents^b

Specific Chemical Incompatibilities^a:

Chemical A	Chemical B
Acetylene and monosubstituted acetylene R - C __ C-H	Halogens Group IB and IIB metals and their salts
Ammonia and NH₄OH	Halogens Halogenating agents Silver Mercury
Carbon, activated	Oxidizing agents^b
Hydrogen peroxide	Metals and their salts
Nitric acid	Metals Sulfuric acid Sulfides Nitrites, other reducing agents Chromic acid and chromates Permanganates
Mercury and its amalgams	Ammonia and NH₄OH Nitric acid Acetylene Sodium azide
Oxalic acid	Silver Mercury
Phosphorus (yellow)	Oxygen Oxidizing agents^b Strong bases
Phosphorus pentoxide	Water Halogenating agents
Sulfuric acid	Metals Chlorates Perchlorates Permanganates Nitric acid

^aChemicals in columns A and B should be kept separate.
^bOxidizing agents include the types of compounds listed in the entry for alkali and alkaline earth metals, etc.

Al Buerer, albuere@sandia.gov
Al Bendure, aobendu@sandia.gov

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