If given only a placard but no specific name or UN/NA number, what guide page should you use?

Using Guide 111 is appropriate when you encounter a situation where a placard is present, but there is no specific name or UN/NA number provided. Guide 111 serves as a general guide for identifying unknown materials or those that are not easily classified due to the absence of precise identifiers. It provides safety recommendations and emergency response information for hazardous materials marked with specific placards.

This guide is designed in scenarios where the material's characteristics can be inferred from the placard colors, shapes, and symbols, allowing responders to take necessary safety precautions even without an exact identification. Following this guidance helps ensure that first responders can effectively manage hazardous materials scenarios in a safe and informed manner.

In contrast, the other guides typically cater to specific classes of materials or situations with more defined parameters, making them less suitable when only a placard is available.