Class 1 Explosives Explained | Dangerous Goods NZ Guide

What Are Class 1 Explosives?

Class 1 dangerous goods include explosive substances, explosive articles and items manufactured to produce an explosive or pyrotechnic effect.

These materials can release large amounts of energy suddenly, producing blast, heat, light, sound and pressure.

Class 1 excludes substances that are not themselves explosive, items too dangerous to transport and substances where the primary hazard belongs to another dangerous goods class. Class 1 is divided into six divisions based on hazard severity, and thirteen compatibility groups used to determine safe storage and segregation.

Class 1 Explosive Divisions 

Division 1.1: Mass Explosion Hazard Substances and articles that can detonate as a whole, producing a mass explosion affecting almost the entire load.

Division 1.2: Projection Hazard Substances and articles that do not cause a mass explosion but may project fragments or debris over a distance. 

Division 1.3: Fire Hazard with Minor Blast or Projection Substances and articles that present a fire hazard and minor blast or projection risk, but not a mass explosion. These materials often produce intense radiant heat when burning. 

Division 1.4: Minor Explosion Risk Substances and articles that present only a small risk of explosion, with effects usually limited to the package. No significant fragment projection is expected. 

Division 1.5: Very Insensitive with Mass Explosion Hazard Very insensitive substances that still have a mass explosion hazard, but are unlikely to detonate under normal transport conditions. 

Division 1.6: Extremely Insensitive Articles Articles containing extremely insensitive explosive substances with very low probability of accidental initiation and no mass explosion hazard.

Examples of Class 1 Explosives

  • Ammunition / cartridges

  • Fireworks and pyrotechnics

  • Flares

  • Blasting caps and detonators

  • Fuses and primers

  • Explosive charges (blasting, demolition)

  • Detonating cord

  • Rockets

  • TNT (Trinitrotoluene)


  • Dangerous Goods Training (NZ)

    If you handle explosives or other dangerous goods by road, proper training is required under NZS 5433 and the Land Transport Rule: Dangerous Goods 2005.

    View our online training:

    Shippers of Dangerous Goods by Road (NZ)