Dangerous goods
Dangerous Goods Class 2.1 — Flammable Gas
Last updated: 6 Jul 2026Reviewed by Ms. Rubab Nizami, Lead AVSEC Faculty
In short
Dangerous-goods Class 2.1 is flammable gas. Gases that catch fire easily, such as butane, propane and hydrogen. Its hazard label is a red diamond showing a flame.
- Class
- 2.1
- Label colour
- Red
- Symbol
- Flame
- Passenger baggage
- Small flammable aerosols (toiletries) allowed within limits; camping gas and lighter refills forbidden.
What are examples of Class 2.1?
Examples include UN 1950 Aerosols, flammable, UN 1011 Butane, UN 1978 Propane. Gases that catch fire easily, such as butane, propane and hydrogen.
How is Class 2.1 handled and labelled?
Keep away from heat and ignition sources; the label is a red diamond with a flame. For passengers: small flammable aerosols (toiletries) allowed within limits; camping gas and lighter refills forbidden.