Which packing group is associated with substances that cause full thickness destruction of intact skin tissue within an observation period of up to 60 minutes, starting after an exposure of 3 minutes or less?

• A. Class 8 Packing Group 1
• B. Class 8 Packing Group 2
• C. Class 2 Packing Group 1
• D. Class 9 Packing Group 1

Answer: (A)

Hazard severity for corrosives in transport is indicated by packing groups, with Class 8 having three levels of danger: Packing Group I is the highest. The description given—full thickness destruction of intact skin tissue within up to 60 minutes after an exposure as short as 3 minutes—defines the most severe level of skin corrosion. That exact criterion is used to assign substances to Packing Group I in Class 8, so the best match is Class 8 Packing Group 1. The other options involve either different classes (where the hazard description wouldn’t apply) or less severe packing groups for corrosives, which doesn’t fit the observed rapid, extreme skin damage.