Graphite is an allotrope of carbon, grayish black, opaque solid, density 2.25 grams per cubic centimeter, melting point 3652 ° C, boiling point 4827 ° C. It has stable chemical properties and corrosion resistance. It is not easy to react with chemicals such as acid and alkali. Burning in oxygen at 687 ° C produces carbon dioxide. It can be oxidized by strong oxidants such as concentrated nitric acid and potassium permanganate. It can be used as anti-wear agent and lubricant. High-purity graphite can be used as neutron moderator in atomic reactor. It can also be used to manufacture crucible, electrode, brush, dry battery, graphite fiber, heat exchanger, cooler, electric arc furnace, Arc lights, pencil refills, etc.
