Any chemical or toxic substances which poses a risk to the health of passengers and crew or the security / safety of aircraft or property, including: - Acids and Alkalis e.g. spillable ‘wet’ batteries - Corrosive or Bleaching Substances - e.g. mercury, chlorine - Disabling or incapacitating sprays - e.g. mace, pepper spray , tear gas - Radioactive material. - e.g. Medicinal or commercial isotopes - Poi...