Which packaging designation refers to cryogenic materials?

Which packaging designation refers to cryogenic materials?

• A. MC 338
• B. MC 331
• C. MC 306
• D. MC 312

Answer: (A)

Cryogenic liquids require specialized, ultra-low-temperature packaging that can maintain extremely cold conditions and safely handle the associated pressures. The designation used for these cryogenic shipments is MC 338, which identifies the packaging designed for such materials. This sets it apart from other designations that cover non-cryogenic liquids or different hazard classes, which do not indicate cryogenic packaging. Examples of cryogenic materials include liquid nitrogen, liquid oxygen, and argon, all of which require insulated, often vacuum-jacketed containers with proper relief devices.

Cryogenic liquids require specialized, ultra-low-temperature packaging that can maintain extremely cold conditions and safely handle the associated pressures. The designation used for these cryogenic shipments is MC 338, which identifies the packaging designed for such materials. This sets it apart from other designations that cover non-cryogenic liquids or different hazard classes, which do not indicate cryogenic packaging. Examples of cryogenic materials include liquid nitrogen, liquid oxygen, and argon, all of which require insulated, often vacuum-jacketed containers with proper relief devices.