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Packaging requirements

There are specific labelling and triple packaging requirements for Category B samples such that it meets packaging instruction P650:

  • Primary receptacle – tube or vial containing the sample which is placed in the secondary packaging.
  • Secondary packaging – for example, a protective packaging case or ziplock bag with absorbent material.
  • The outer packaging – intended to protect the entire contents.
  • There may also be additional postal envelopes to place the entire package in for postal return. The external surface of the package must be labelled with UN3373 and clearly state BIOLOGICAL SUBSTANCE CATEGORY B.

There are additional packaging requirements for frozen samples requiring shipment using BioFreeze bottles or Dry Ice. For information please contact the Referrals Dept (

Updated Monday, 20 November 2023