What special hazard do cryogenic containers present?

• A. High flammability
• B. Extreme cold that can embrittle materials
• C. Massive weight that causes spills
• D. Radioactive contents

Answer: (B)

Cryogenic containers are designed to store gases at extremely low temperatures, which can cause various materials to become brittle and fracture when exposed to such conditions. This phenomenon, known as embrittlement, affects metals and other materials, potentially leading to structural failures or leaks. The extreme cold can make handling these containers especially hazardous, as any failure could result in the rapid release of gas, creating additional risks such as asphyxiation or rapid phase change from liquid to gas.

While some cryogenic materials can be flammable, the primary concern is the extreme cold and its effects on materials. Other options, like massive weight or radioactivity, do not typically characterize cryogenic substances, making them less relevant to the specific hazards associated with cryogenic containers.