Category B Biological Substances (UN3373)

Versapak manufacture UN3373 Medical Carriers
Storing and transporting samples according to UN3373 with Versapak’s compliant Medical Carriers (PYTB)

If your medical organisation or laboratory is in need of UN3373 compliant products then Versapak Insulated Medical Carriers are just that.  As directed by the Packing Instruction P650, our products can carry Category B Biological Substances when used with a primary and inner packaging liner such as the Versapak Anti-Spillage Liner.

Transporting Specimens according to P650 in a Versapak

A brief description of UN3373 & P650

Category B Biological Substances are typically specimens and samples of a biological nature, used as diagnostic substances for the research and development within the clinical laboratories. Where the substances pose a threat, the UN has implemented additional guidelines for the management of infectious diseases and clinical waste, read more information here.

Use Versapak spill liners and absorbent pads

Primary, Inner and Outer Packaging

A Versapak medical carrier forms the outer packaging of the UN3373 compliance, we can also supply the inner packaging too for the safe transportation of biological substances.  A primary receptacle is required and usually dictated by the laboratory.  We supply Versapak Medical Carriers in small (7 litre), medium (20 litre) and large (38 litre) internal capacities to suit most laboratory and medical requirements. Anti-spillage liners make-up the inner packaging and are also supplied in small, medium and large sizes to suit carriers. Fastening clips are applied to the liners, preventing further issues with samples leaking with the outer packaging and you need to place absorbent pads inside the liner to ensure protection and correct procedures are followed. Versapak can provide all the parts of the UN3373 system you need. Shop our UN3373 and Thermal Medical bundles here.

You need to seal the carrier to be UN3373 compliant. Use the Versapak patented T2 locking system to safely seal your Versapak and protect the contents from tampering.


For a complete explanation of the instruction, visit our UN3373 & P650 explained page

For more information please contact us or visit our frequently asked questions section.

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We are Versapak International Ltd and we help businesses store and transport documents and sensitive items. Our reusable and tamper evident bags, cash bags and varied use security seals are used by leading companies in many industries throughout the world.
The Versapak Centre, 4 Veridion Way
DA18 4AL
United Kingdom