Category B Infectious Substances

Infectious substance means a material known or reasonably expected to contain a pathogen. A pathogen is a microorganism that can cause disease in humans or animals. Examples of pathogens include bacteria, viruses, fungi, and other infectious agents. An infectious substance must be assigned to one of the following two packaging categories:

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For more information, please reference PUB 52 USPS Packaging Instruction 6C

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Ethanol Based Flammable Liquids & Solids

Certain limited quantities of flammable liquids and solids containing ethyl alcohol are permitted in the domestic mail via air transportation, with special authorization from the director, Product Classification when all applicable requirements in 343.27 are met.

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Required prior written Authorization must be obtained from: