In the storage of amalgam waste, what is the correct container color and lid?

• A. Red with white lid
• B. White with blue lid
• C. Blue with red lid
• D. White with red lid

Answer: (D)

Amalgam waste is hazardous because it contains mercury, so it must be kept in a sealed, leak‑proof container that is clearly labeled for chemical/mercury waste. The standard color choice is a white body with a red lid: the white container is widely used for chemical/hazardous waste, and the red lid signals hazardous material, helping staff recognize and handle it correctly for disposal. The lid should be firmly closed to prevent spills, and the container labeled to ensure it goes to the appropriate licensed waste system. Other color combinations don’t communicate the hazard as consistently, which is why white with a red lid is the appropriate option.