Fire Hazards in Presence of Various Substances: Slightly flammable to flammable in presence of open flames and sparks, of heat, of oxidizing materials.
Conditions of Instability: Excess heat, incompatible materials.
Incompatibility with various substances: Highly reactive with oxidizing agents.
Reacts vigorously with liquid potassium, and potassium peroxide. If graphite contacts liquid potassiuim, rubidium or caesium at 300℃, intercalation compounds may be formed.