What does 49 CFR 173.4b (De minimis exceptions) require?

Short answer

The de minimis exceptions in 49 CFR 173.4b apply to certain materials, including Packing Group I materials of hazard Division 6.1 and Packing Group II and III materials of hazard Class 3, Division 4.1, Division 4.2, Division 4.3, Division 5.1, Division 6.1, Class 8, and Class 9, under specific packaging and quantity conditions.

The rule says

"Packing Group I materials of hazard Division 6.1 (no inhalation hazard), and Packing Group II and III materials of hazard Class 3, Division 4.1, Division 4.2, Division 4.3, Division 5.1, Division 6.1, Class 8, and Class 9." (49 CFR 173.4b)

"The aggregate quantity of hazardous material per package does not exceed 100 g (0.22 pounds) for solids or 100 mL (3.38 ounces) for liquids" (49 CFR 173.4b)

"The gross mass of the completed package does not exceed 29 kg (64 pounds)" (49 CFR 173.4b)

In plain English

The de minimis exceptions in 49 CFR 173.4b are designed to exempt small quantities of certain hazardous materials from the full range of regulations, provided they are packaged and handled according to specific guidelines. This means that shippers and carriers must carefully follow the rules for packaging, marking, and documenting these materials to ensure compliance. The exceptions are intended to simplify the transportation of small quantities of hazardous materials, but they still require attention to detail and adherence to the regulations.

What to do

• Verify the material meets the criteria for a de minimis exception under 49 CFR 173.4b.
• Ensure packaging meets the requirements, including quantity limits and proper sealing.
• Check the gross mass of the completed package does not exceed 29 kg (64 pounds).
• Review documentation requirements, including any necessary markings or shipping papers.