Prohibited for air transport under any circumstances: Any substance that, when presented for transport, is capable of exploding, reacting dangerously, igniting, or emitting hazardous amounts of heat or toxic, corrosive, or flammable gases or vapors under normal conditions encountered during transport must not be carried on aircraft under any circumstances.
Substances (including mixtures and solutions) and articles are classified into 9 hazard classes based on the type of hazard they present. Some of these classes are further divided into categories.
Examples: TNT, nitroglycerin, and others.
Examples: grenades, rockets, ammunition, and others.
Examples: gunpowder, fireworks, pyrotechnic compositions, and others.
Examples: cartridges, charges, and others.
Examples: substances with a mass explosion hazard.
Examples: articles with no mass explosion hazard.
Examples: propane, butane, and other gases.
Examples: air, nitrogen, and other gases.
Examples: chlorine, mustard gas, and others.
Examples: gasoline, kerosene, solvents, and other liquids.
Examples: metal powders, aluminum powder, and others.
Examples: phosphorus, napalm, coal, and others.
Examples: calcium carbide, sodium, uncoated aluminum powder.
Examples: fertilizers, nitrates, hydrogen peroxide, and others.
Examples: hydroperoxide, white paint components, and others.
Examples: arsenic, copper, and others.
Examples: bacteria, viruses, and others.
Examples: uranium, plutonium, radium, and others.
Examples: acids, alkalis, and others.
Examples: asbestos, mercury thermometers, and others.