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Hazard Predictions

• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Polymerization hazard: Polymerization reaction may become intense and may cause pressurization

Some dienes, such as isoprene and butadiene, polymerize at room temperature on contact with high-surface-area sodium, such as a powder or a thin layer (Pascal, P. 1966. Nouveau Trait茅 de Chimie Min茅rale. Vol. 2, Part 1, p. 224. Masson et Cie.). Polymerization reactions can generate heat, and may cause a dangerous rise in pressure if the reaction occurs in a closed container.