What are the minimum dimensions for one surface of the outer packaging of a Category B package?

• A. 4 mm x 4 mm
• B. 100 mm x 100 mm
• C. 400 mm x 400 mm
• D. 1 m x 1 m

Answer: (B)

Minimum outer packaging surface dimension for a Category B shipment is 100 mm by 100 mm on one surface. This ensures the outer package can securely hold the triple packaging (primary receptacle, secondary containment, absorbent) and still provide enough area for the required labels and markings to remain readable and intact during handling and transport. A surface of 4 mm by 4 mm is far too small to accommodate contents and labeling, while 400 mm by 400 mm or 1 m by 1 m would be larger than necessary and add unnecessary bulk. Thus, 100 mm by 100 mm is the proper minimum.