Civil Aviation Safety Regulations forbid the carriage of most items of Dangerous Goods onto an aircraft such as: 

• Flammable liquids: Such as lighter or heating fuels, flammable paints, paint thinner etc.

• Flammable solids: Such as matches and articles which are easily ignited, substances liable to spontaneous combustion and substances which emit flammable gases on contact with water.

• Gases: Flammable, non-flammable and poisonous, oxygen tanks, deeply refrigerated gases such as liquid nitrogen.

• Corrosives: Such as mercury, acids, alkalis, wet cell batteries, drain cleaners etc.

• Oxygen: For medical use.

• Explosives, munitions, fireworks, flaresIncluding fire and Christmas crackers, toy caps, detonators and fuses.

• Spare batteries

• Infectious substances: Substances that are known or expected to contain pathogens and other agents such as prions, which can cause disease in humans or animals.

• Oxidizing materials: Such as bleaching powder and peroxides.

• Toxic substances: Disabling or incapacitating sprays, infectious or biologically hazardous material e.g. infected blood, bacteria and viruses, poisons etc.

• Magnetic Materials: Strong magnets such as those in some loudspeakers and laboratory equipment.

• Radioactive materials: E.g. medicinal or commercial isotopes

• Miscellaneous: Including asbestos, charcoal and engines