Chemistry Hazard Symbols

A

100

This substance can catch fire easily.

Flammable

200

This substance can cause death if swallowed or inhaled.

Toxic

300

This substance can cause moderate skin irritation.

Moderate Hazard

400

This substance enables other flammable substances to burn more easily.

Oxidizing

500

This substance can cause breathing difficulties.

Health Hazard

B

100

This container contains pressurized gas that may be very cold when it is released, and the container may explode if it is heated.

Gas under pressure

200

This substance can damage plants and animals.

Environmental Hazard

300

This substance is explosive.

Explosive

400

This substance can cause damage to skin and clothing.

Corrosive