Which statement best describes highlighted chemicals in the ERG?

• A. They are household products
• B. They present a poison inhalation hazard
• C. They are nonhazardous
• D. They require no PPE

Answer: (B)

Highlighted chemicals in the ERG denote a poison inhalation hazard. This means inhaling their vapors, gases, or aerosols can cause serious injury or death, even at low concentrations. That designation helps responders quickly identify materials that require respiratory protection and careful action to prevent inhalation exposure. While some highlighted items may be household products, the important point is their inhalation risk, not their everyday use. They are not nonhazardous, and PPE is typically necessary—respiratory protection and other protective measures are often required when dealing with PIH substances. In practice, you’d consult the PIH guidance in the ERG, establish appropriate isolation and ventilation, and wear the proper PPE to prevent inhalation exposure.