Barium alloys, pyrophoric

Synonyms Elemental barium barium ion barium, alloys, non-pyrophoric barium, alloys, pyrophoric barium, metal, non-pyrophoric0 Acetic acid, barium salt barium diacetate barium acetate monohydrated,e Carbonic acid, barium salt witheritee,f... 

BARITE (7727-43-7) see barium sulfate. BARIUM ALLOYS, PYROPHORIC... 

BARIUM ALLOYS, pyrophoric 1902 60 DIISOOCTYL ACID PHOSPHATE... 

PYROPHORIC MATERIAL. Any liquid or solid that will ignite spontaneously in air at about 130F (54.4C). Titanium dichloride and phosphorus are examples of pyrophoric solids tnbutylaluminum and related compounds are pyrophoric liquids. Sodium, butyLithium, and lithium hydride are spontaneously flammable in moist air because they react exothermically with water, Such materials must be stored in an atmosphere of inert gas or under kerosene. Some alloys (barium, misch metal) are called pyrophoric because they spark when slight friclion is applied. 

ARTIC (74-87-3) Flammable gas (flash point <32°F/<0 C). Moisture causes decomposition. Violent reaction with strong oxidizers, acetylene, anhydrous ammonia, amines, fluorine, interhalogens, magnesium, potassium, sodium, zinc, and their alloys. Reacts with barium, lithium, titanium. Contact with powdered aluminum or aluminum chloride forms pyrophoric trimethylaluminum may cau.se ignition or explosion. Attacks plastics, rubber, and coatings. 

When we read however, that an alloy of copper, zinc, and barium metal is described as pyrophoric, stable in air we realize that a second meaning, that of producing sparks when ground or abraded, is attached to the word pyrophoric, causing a need for clarification where the word pyrophoric is used without further ampliflcation. Metals and metal alloys of the spark-producing category—borderline cases both of pyrophoric behavior and of pyrotechnic interest—are the subject of this chapter. 

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