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Biological Substance, Category B
49 CFR 173.199, IATA Section 3.6.2

Biological Substance, Category A means an infectious substance known to contain or suspected of containing a pathogen. Biological Substance, Category A are not accepted by UPS.

Biological Substance, Category B means an infectious substance that is not in a form generally capable of causing permanent disability or life-threatening or fatal disease in otherwise healthy humans or animals when exposure to it occurs. This includes Category B infectious substances transported for diagnostic or investigational purposes. Biological Substance, Category B are accepted by UPS.

Packaging Requirements

Both regulations 49 CFR (173.199) and IATA ( require that packages containing Biological Substance, Category B are "triple-packed." Triple packaging consists of a primary receptacle, a secondary packaging, and a rigid outer packaging.

The UPS Laboratory Pak is designed for Next Day Air shipping and serves as a watertight over wrap for federally-mandated inner packaging.

Marking Requirements

Packages containing Biological Substance, Category B must be clearly marked "Biological Substance, Category B."

The package must also be marked with the identification number "UN3373" in a square-on-point configuration.

The name, address, and telephone number of a person knowledgeable about the shipment must also be included either on a written document or on the outer packaging.

If you have any questions about shipping hazardous materials with UPS, please call the UPS Hazardous Materials Support Center 1-800-554-9964.

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