Dangerous Goods

Dangerous Goods Class 4: Flammable Solids

Dangerous goods Class 4 (Flammable Solids): Solids which are easily ignited, self-reactive substances, or substances which emit flammable gases when wet.

Class: 4
Name: Flammable Solids
Label: Red/White stripes (4.1), White/Red (4.2), Blue (4.3), Flame
Packing groups: PG I - High danger, PG II - Medium danger, PG III - Low danger

Solids which are easily ignited, self-reactive substances, or substances which emit flammable gases when wet.

Air transport: restricted

Sea transport: allowed

Class 4 hazards

Fire
Self-heating
Water reactivity
Spontaneous combustion

Class 4 divisions

4.1 Flammable Solids: Solids readily combustible or may cause fire through friction Examples: Matches, Sulfur, Celluloid, Nitrocellulose, Magnesium.
4.2 Spontaneously Combustible: Substances liable to spontaneous heating or ignition in air Examples: White phosphorus, Activated carbon, Oily rags, Fishmeal.
4.3 Dangerous When Wet: Substances which emit flammable gases when in contact with water Examples: Sodium, Potassium, Calcium carbide, Lithium, Magnesium powder.

Class 4 examples

Matches
Sodium metal
Calcium carbide
Activated carbon
Metal powders

Special requirements for Class 4

4.1: Keep cool and dry
4.2: May require inert atmosphere or temperature control
4.3: Must be kept completely dry, waterproof packaging
Fire suppression systems may be restricted (no water for 4.3)

Segregation of Class 4

4.3 must be kept away from water and Class 8

Frequently asked questions

What is dangerous goods Class 4?

Class 4 covers flammable solids. Solids which are easily ignited, self-reactive substances, or substances which emit flammable gases when wet.

Can Class 4 goods travel by air?

restricted

Can Class 4 goods travel by sea?

allowed