When encountering unknown containers with no labels, which resource should you consult for identification cues?

When encountering unknown containers with no labels, which resource should you consult for identification cues?

• A. Emergency Response Guidebook (ERG).
• B. OSHA regulations.
• C. Local police.
• D. Manufacturer's MSDS.

Answer: (A)

When you’re faced with an unknown container that has no label, you need a resource that translates what you can observe into hazard information and immediate actions. The Emergency Response Guidebook is designed for this exact situation: it helps first responders identify hazardous materials at the scene using visible cues like container type and size, packaging, color, markings, placards, and any labeling remnants, and then provides recommended actions such as isolation distances, PPE, and steps for spill control and notification. That direct link from what you see to what you should do makes it the best choice. OSHA regulations cover safety requirements and training but don’t offer on-scene identification cues for an unknown substance. Local police can secure the area but don’t provide hazard identification guidance. A manufacturer’s MSDS contains information about a known chemical, but you can’t use it if you don’t know what the substance is.