Which code is used for special packaging of infectious substances that must meet the requirements of 6.5.2?

• A. V
• B. T
• C. W
• D. U

Answer: (D)

Special packaging requirements apply to infectious substances that must be contained and protected from leakage during transport. The letter code used to indicate that a shipment must use this kind of packaging, meeting the specific criteria of 6.5.2, is U. This designation signals to shippers and carriers that the packaging must conform to the stricter requirements outlined in 6.5.2, ensuring a higher level of containment and integrity beyond standard packaging. In practice, it means using packaging that has been tested and certified to the relevant standards, with the appropriate containment components and outer packaging as required. The other codes represent different packaging classifications and do not indicate the special packaging requirement of 6.5.2.