What hazard does a yellow hazmat placard indicate?

What hazard does a yellow hazmat placard indicate?

• A. Health hazard.
• B. Reactivity hazard.
• C. Flammable.
• D. Environmental hazard.

Answer: (B)

The color code used on hazmat placards is designed to quickly convey the type of hazard. Yellow represents reactivity (instability). This means the substance may undergo violent chemical changes or release energy when subjected to heat, shock, friction, confinement, or when mixed with water or other substances. Because of this potential for dangerous reactions, responders must treat it with extra caution, avoiding conditions that could trigger a reaction and using appropriate containment and ventilation. Blue would indicate a health hazard, red signals flammability, and environmental or other special hazards are shown by different markers or symbols. So the yellow placard is signaling a reactivity danger, not health, flammability, or environmental risk.

The color code used on hazmat placards is designed to quickly convey the type of hazard. Yellow represents reactivity (instability). This means the substance may undergo violent chemical changes or release energy when subjected to heat, shock, friction, confinement, or when mixed with water or other substances. Because of this potential for dangerous reactions, responders must treat it with extra caution, avoiding conditions that could trigger a reaction and using appropriate containment and ventilation.

Blue would indicate a health hazard, red signals flammability, and environmental or other special hazards are shown by different markers or symbols. So the yellow placard is signaling a reactivity danger, not health, flammability, or environmental risk.