Which of the following describes UN3373?

UN3373 specifically refers to "Biological Substances, Category B," which encompasses human or animal materials intended for diagnostic or investigative purposes. This classification is used for specimens that may contain pathogens, but are not classified as infectious or hazardous in nature under regulations for dangerous goods. In the context of transportation, it is essential to label and package these substances according to specific guidelines to ensure safety during transit.

The designation emphasizes the need for proper handling and packaging to mitigate any biological risks associated with these materials. The International Air Transport Association (IATA) and other regulatory bodies provide clear instructions on how such substances should be contained and marked, affirming their importance in medical and scientific settings.