Which class do vesicants/blister agents, such as nitrogen mustard, belong to in the UN/DOT classification?

• A. 2.1
• B. 6.2
• C. 4.3
• D. 3.0

Answer: (B)

Vesicants, also known as blister agents, such as nitrogen mustard, belong to the category of hazardous materials that cause severe skin, eye, and mucosal damage upon contact. In the UN/DOT classification system, these agents are classified as "infectious substances" which fall under the category of Class 6.2. The classification reflects the potential for significant harm to human health and the environment through exposure to these toxic substances.

Class 6.2 specifically applies to agents that are potentially infectious or toxic, hence it is the appropriate classification for blister agents like nitrogen mustard. Understanding this classification is crucial for proper handling, transportation, and emergency response strategies related to hazardous materials.