What is represented by UN3373?

UN3373 specifically designates "Biological Substance Category B." This classification is used in the transport of material that is not infectious but still requires careful handling to avoid potential exposures, such as specimens for diagnostic testing or research purposes. The designation is important because it informs transporters and emergency responders about the nature of the material, ensuring the correct safety measures are followed.

In the context of dangerous goods, this classification helps to establish the proper packaging requirements, labeling, and emergency response protocols. Biological Substance Category B substances must be packed in accordance with the regulations set forth in the TDG, ensuring safe transportation while minimizing risks to public health and safety.

This answer distinctly characterizes the designated UN number, while other options either pertain to different classifications under UN standards or do not accurately reflect the substance associated with UN3373.