What is a packing group, and where does it appear in hazmat documentation?

• A. A packing group indicates the number of packages
• B. A packing group is not used on hazmat
• C. A packing group (I, II, III) indicates hazard severity and appears on the shipping paper and packaging if required
• D. A packing group is a color code on labels

Answer: (C)

Packing group indicates how severe the hazard is for certain dangerous goods and where to look for it in the regulations. The letters I, II, and III show increasing levels of danger, with I being the most hazardous and III the least. This designation helps determine the appropriate packaging standards and performance requirements for the material. You’ll find the packing group listed on the shipping paper (the hazmat description line) and on the packaging itself if the rules require it. It’s not a count of packages, it’s not unused in hazmat rules, and it isn’t a color code used on labels—the label colors and symbols serve different labeling purposes.