Which color of the Emergency Response Guidebook (ERG) is associated with UN numbers?

The Emergency Response Guidebook (ERG) uses a color-coded system to help responders quickly locate critical information during hazardous materials incidents. The yellow section specifically is dedicated to listing and organizing materials by their UN (United Nations) numbers. Each UN number corresponds to a specific substance or group of substances, providing vital information on the risks and emergency response measures associated with that material.

In contrast, the other colors serve different purposes. For instance, the blue section is organized alphabetically by name of the material, the orange section provides specific guidance on emergency response actions related to hazardous materials, and the green section is designated for information regarding specific protective actions and evacuation distances. Understanding this color-coding is essential for emergency responders to effectively and efficiently manage hazardous material incidents.