A phone battery can start a fire on a plane
Dangerous Goods in Aviation — The 9 Classes & UN Numbers
Last updated: 6 Jul 2026Reviewed by Ms. Rubab Nizami, Lead AVSEC Faculty
In short
Dangerous goods (DG) are articles that can harm people, property or an aircraft during air transport. This hub explains the 9 classes with examples, UN numbers, the India rules for lithium batteries and power banks, and the steps to take if you find a leak.
Explore this topic
- The 9 Classes of Dangerous Goods
- Power Bank Rules on Flights in India
- Dangerous Goods Class 1 — Explosives
- Dangerous Goods Class 2.1 — Flammable Gas
- Dangerous Goods Class 2.2 — Non-Flammable, Non-Toxic Gas
- Dangerous Goods Class 2.3 — Toxic Gas
- Dangerous Goods Class 3 — Flammable Liquid
- Dangerous Goods Class 4.1 — Flammable Solid
- Dangerous Goods Class 4.2 — Spontaneously Combustible
- Dangerous Goods Class 4.3 — Dangerous When Wet
- Dangerous Goods Class 5.1 — Oxidizer
- Dangerous Goods Class 5.2 — Organic Peroxide
- Dangerous Goods Class 6.1 — Toxic Substance
- Dangerous Goods Class 6.2 — Infectious Substance
- Dangerous Goods Class 7 — Radioactive Material
- Dangerous Goods Class 8 — Corrosive
- Dangerous Goods Class 9 — Miscellaneous Dangerous Goods
- Common Aviation UN Numbers