What is the hazard class represented by the placard illustration?

What is the hazard class represented by the placard illustration?

• A. Explosives
• B. Poison Gas
• C. Flammable Solids
• D. Oxidizers

Answer: (D)

A flame over a circle on a placard is the telltale symbol for oxidizers, which are hazard class 5.1. This symbol indicates materials that can release oxygen or otherwise promote combustion, making fires burn more fiercely or spread more quickly. That’s why the placard points to oxidizers—the symbol is specific to this class and communicates the key risk: these substances don’t necessarily burn themselves, but they greatly enhance the burning of other materials nearby. Other hazards have different icons: explosives use an exploding bomb symbol, and poisonous gases are shown with a skull-and-crossbones or a gas-related pictogram. A plain flame might indicate flammable substances, but the flame-over-circle icon is distinctively linked to oxidizers, helping you recognize the danger and handle the material with appropriate separation from fuels and reducing agents.

A flame over a circle on a placard is the telltale symbol for oxidizers, which are hazard class 5.1. This symbol indicates materials that can release oxygen or otherwise promote combustion, making fires burn more fiercely or spread more quickly. That’s why the placard points to oxidizers—the symbol is specific to this class and communicates the key risk: these substances don’t necessarily burn themselves, but they greatly enhance the burning of other materials nearby.

Other hazards have different icons: explosives use an exploding bomb symbol, and poisonous gases are shown with a skull-and-crossbones or a gas-related pictogram. A plain flame might indicate flammable substances, but the flame-over-circle icon is distinctively linked to oxidizers, helping you recognize the danger and handle the material with appropriate separation from fuels and reducing agents.