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Hazard Predictions

• Explosive: Reaction products may be explosive or sensitive to shock or friction
• Flammable: Reaction products may be flammable
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Polymerization hazard: Polymerization reaction may become intense and may cause pressurization

Powdered cobalt incandescently decomposes acetylene on contact, posing a fire hazard (J. W. Mellor, 1942. Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 14, pp. 513. Longmans, Green and Co Ltd.). Hydrogen gas may be formed in this reaction (Predicted).

Polymerization of butadiene is initiated by cobalt metal (Miller, G.H. et al. 1964. Journal of Polymer Science (Part C) 1109-1115).

Acetylenic compounds with replaceable acetylenically bound hydrogen atoms must be kept out of contact with copper, silver, magnesium, mercury, or alloys containing them, to avoid formation of explosive metal acetylides ("Chemical Intermediates", 1972 Catalogue, 158, Tamaqua (Pa.), Air Products and 365bet娱乐 Inc., 1972; Dangerous Substances: Guidance on Fires and Spillages, London, HMSO, 1972, Sect. 1, p. 27).

Potential Gas Byproducts

• Hydrogen (H2)