What UN number is assigned to Category B substances?

The UN number assigned to Category B substances is UN3373. Category B substances refer to biological substances that pose a risk to human health, specifically those that are not infectious but are classified as containing potentially harmful materials. UN3373 is specifically designated for this type of substance, which helps ensure proper handling, packaging, and transport.

The specific categorization as a Category B substance underlines the importance of careful transportation protocols to prevent any potential risks associated with these biological materials. The UN number acts as a universal identifier in the logistics and transportation industries, ensuring that all parties, from shippers to carriers to emergency responders, have a clear understanding of the nature of the cargo being transported.

Other options, such as UN2814, refer to infectious substances, while UN1234 and UN5678 denote different classifications for various types of dangerous goods that do not match the Category B specifications. This classification system helps in reinforcing safety measures and compliance with international regulations.