Hazardous & Prohibited Substances:
National | International

Toxic or Very Toxic
May cause serious or extremely serious health risks or death, e.g. pathogenic material, asbestos, weed killers, solvents, poison, insecticides.

Corrosive
Can cause chemical burns, e.g. bleach, acids, alkalis, car batteries, caustic soda.

Flammable Liquids and Solids
(Highly or Extremely): e.g. solvents, petroleum products, gases, glue, fire lighters, varnish, industrial alcohol.

Explosive
May explode if subject to heat, shock or friction, e.g. flares, fireworks, igniters, blasting caps, ammunition, primers, potassium nitrate, gas cylinders.

Oxidising
When in contact with some other substances can start a fire or make a fire worse, e.g. peroxides, fibreglass repair kits, bromates, chlorates.

Harmful or Irritant
Can cause health risks or irritation, e.g. dyes, oil based paint.

Radioactive
e.g. medical tracers, radioisotopes, equipment containing radioactive sources.