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placed in a single secondary packaging, they shall be secured
together, individually wrapped or separated to prevent contact between
them.
• Specimens sent in liquid nitrogen should be placed in a dry shipper.
• Microscopic slides should be packaged together by surgical number.
These often become broken in shipment unless carefully packaged.
Commercially available plastic slide holders manufactured to withstand
shipment should be used or the slides should be sufficiently wrapped
and padded inside their shipping container to prevent breakage.
• Paraffin blocks should be packaged together by surgical number and
shipped in an appropriately labeled box or plastic bag. Do not wrap in
gauze. Paraffin blocks may melt in hot climate so appropriate
packaging is recommended prior to shipment.

b) A leak-proof secondary packaging

• Examples of a secondary packaging are a snap lock plastic bag and an
empty clean screw cap jar.
• Secondary packaging shall be secured in an outer packaging with
suitable cushioning material. Any leakage of the contents shall not
compromise the integrity of the cushioning material or of the outer
packaging.
• For liquids, absorbent material e.g. gauze, cotton, paper towel or super
absorbent pad, should be present in case of leakage and for
cushioning.
• A liquid nitrogen dry shipper shall not be used as secondary packaging.

c) An outer packaging

• The outer packaging shall be a solid strong and durable container fitted
with a secure closure to prevent loss of contents under normal
transport conditions.

v. Place primary receptacle into the secondary packaging. Each primary
receptacle may be individually wrapped or separated with absorbent
material or bubble wrap. If multiple primary receptacles are placed in a
single secondary packaging, a rubber band may be used to secure all
inner receptacles.

7.2 LABELLING, MARKING AND DOCUMENTATION

i. Packaging of Category B and C biological materials for surface transport
should be labeled clearly with the following information on the outer
packaging.

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