Category B: UN Identification Numbers and Proper Shipping Names - LabCE.com, Laboratory Continuing Education

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The page below is a sample from the LabCE course Packaging and Shipping Infectious Materials. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Packaging and Shipping Infectious Materials (online CE course)

Category B: UN Identification Numbers and Proper Shipping Names

The UN identification number and the proper shipping name for category B biological substances is:

UN3373 Biological substance, Category B

UN3373 is used if the substance qualifies as a category B biological substance and the human or animal materials are being transported only for the purpose of diagnosis or investigation. Diagnostic specimens do not include live infected animals.¹

The proper shipping name must be written exactly as shown; abbreviations are not acceptable.

1. "Category B." UN3373.com, 2021, https://www.un3373.com/category-biological-substances/category-b/.

Category B labels.

A shipment with Category B labels, highlighted in red.