What does 49 CFR 172.320 (Explosive hazardous materials) require?

Short answer

49 CFR 172.320 requires each package containing a Class 1 material to be marked with the EX-number for each substance, article, or device contained therein, unless otherwise provided in paragraphs (b), (c), (d), or (e) of this section.

The rule says

"Each package containing a Class 1 material must be marked with the EX-number for each substance, article or device contained therein." (49 CFR 172.320(a))

"Except as otherwise provided in paragraphs (b), (c), (d) and (e) of this section, each package containing a Class 1 material must be marked with the EX-number for each substance, article or device contained therein." (49 CFR 172.320)

In plain English

This regulation is about labeling packages that contain explosive hazardous materials. The goal is to clearly identify the contents of the package so that handlers and responders can take the necessary precautions. The rule allows for some exceptions, such as when the package is being shipped to a testing agency or for developmental testing. In practice, this means that shippers and carriers need to ensure that their packages are properly labeled with the correct EX-number, which can be a complex process given the various exceptions and requirements.

What to do

• Verify the classification of the hazardous material to determine the correct EX-number.
• Ensure that the package is properly labeled with the EX-number, unless an exception applies.
• Review the regulations and exceptions in 49 CFR 172.320 to determine if any apply to the specific shipment.
• Consult with a qualified hazardous materials expert if there are any questions or concerns about labeling or shipping requirements.