Glossary Definition - UN Hazard Codes

UN Hazard codes

• Class 1 Explosive
  • 1.1 Substances with a mass explosion hazard
  • 1.2 Substances which present a projection hazard but no mass explosion hazard
  • 1.3 Substances which present both a fire hazard and a minor blast or projection hazard (or both) but not a mass explosion hazard
  • 1.4 No significant hazard
  • 1.5 Very insensitive substances with a mass explosion hazard
  • 1.6 Very insensitive articles with no mass explosion hazard
• Class 2 Gases
  • 2.1 Flammable gases
  • 2.2 Non-flammable, non-toxic gases
  • 2.3 Toxic gases
• Class 3 Flammable liquids
• Class 4 Flammable solids
  • 4.1 Flammable solids, self-reactive substances and solid desensitized explosives
  • 4.2 Materials liable to spontaneous combustion
  • 4.3 Substances which, in contact with water, release flammable gases
• Class 5. Oxidizing substances and organic peroxides
  • 5.1 Oxidizing agents
  • 5.2 Organic peroxides
• Class 6 Toxic and infectious substances
  • 6.1 Toxic substances
  • 6.2 Infectious substances
• Class 7 Radioactive substances and articles
• Class 8 Corrosive substances
• Class 9 Miscellaneous dangerous substances