The label tells you the danger before you open the box

Dangerous Goods Labels & Placards — All 9 Classes, Colours & Meanings

Last updated: 6 Jul 2026Reviewed by Ms. Rubab Nizami, Lead AVSEC Faculty

In short

Dangerous goods hazard labels tell you the danger at a glance: a diamond with a class number, symbol and colour. This hub lists every label and placard with its correct colour and meaning — Flammable Gas is red (2.1), Non-Flammable Gas is green (2.2), Dangerous When Wet is blue (4.3).

Every dangerous-goods label and its colour

Class	Label	Colour
1	Explosives	Orange
2.1	Flammable Gas	Red
2.2	Non-Flammable, Non-Toxic Gas	Green
2.3	Toxic Gas	White
3	Flammable Liquid	Red
4.1	Flammable Solid	Red-and-white stripes
4.2	Spontaneously Combustible	White top, red bottom
4.3	Dangerous When Wet	Blue
5.1	Oxidizer	Yellow
5.2	Organic Peroxide	Red-and-yellow
6.1	Toxic Substance	White
6.2	Infectious Substance	White
7	Radioactive Material	Yellow-and-white
8	Corrosive	White top, black bottom
9	Miscellaneous Dangerous Goods	Black-and-white stripes

Class 1 — Explosives
Class 2.1 — Flammable Gas
Class 2.2 — Non-Flammable, Non-Toxic Gas
Class 2.3 — Toxic Gas
Class 3 — Flammable Liquid
Class 4.1 — Flammable Solid
Class 4.2 — Spontaneously Combustible
Class 4.3 — Dangerous When Wet
Class 5.1 — Oxidizer
Class 5.2 — Organic Peroxide
Class 6.1 — Toxic Substance
Class 6.2 — Infectious Substance
Class 7 — Radioactive Material
Class 8 — Corrosive
Class 9 — Miscellaneous Dangerous Goods