Figure 3-17. Examples of hazardous materials warning placards

Oxidizers - Items with this placard readily yield oxygen and will greatly accelerate burning. In

the event of spill, these materials must not be allowed to come in contact with combustible or

flammable materials, corrosive materials, or organic matter. Water can be used to fight fires

involving liquid oxidizers. Wet dirt or sand should be used to fight fires involving solid oxidizers.

Organic Peroxides - Items with this placard are strong oxidizing agents. In addition, when

heated or subjected to strong shocks, organic peroxides can decompose rapidly with explosive

force. Care must be taken to avoid contamination of organic peroxides by other chemicals as

violent chemical reactions can occur.

Oxygen - Items with this placard, refrigerated liquid oxygen, if allowed to come in contact with

combustible or oxidizing materials may result in rapid combustion or explosion. Sources of

ignition, sparks, impacts, friction, or sudden shocks should be prevented in the spill area. Contact

with the liquid can result in severe frostbite.

Nonflammable Gas - Items with this placard are gases that can cause suffocation by displacing

oxygen. They may be toxic or irritating; and contact with the liquid may cause frostbite injuries.

Containers that are exposed to flame impingement or intense heat may rupture violently, hurling

fragments great distances. An evacuation distance of 1/2 mile is recommended.

Figure 3-17. Examples of hazardous materials warning placards.

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