Verifying the Shipment on Arrival

Cold chain integrity is best judged at the point of receipt, before anything is moved into storage. The person receiving the parcel should record observations against the dispatch documentation while the packaging is still intact.

• The condition of the insulated pack: intact outer carton, undamaged insulation, seal unbroken.
• The state of the gel pack or phase-change material: still solid, partially thawed, or fully liquid.
• The in-transit temperature indicator or data logger trace, read and recorded rather than discarded.
• The arrival time and, where an instrument is available, surface temperature readings on the pack or a vial exterior.
• Any visible leakage, condensation, powder displacement or vial damage.

These readings belong in the batch record for the material received, not in a general delivery log. A trace with no timestamp or a logger that was never started provides no assurance and should be treated as an incomplete record.

Quarantine Before Release

Material should remain in a quarantine state until the documentation has been checked. Reconciliation means confirming that the vial count, the label identifiers and the lot number on each vial agree with the certificate of analysis for that lot. Any discrepancy is a documentation defect and should be resolved before the material is moved to released storage. Keeping quarantine and released locations physically separate prevents an unverified vial from entering an active experiment.

Equilibrating Vials Before Opening

Vials removed from cold storage should be allowed to equilibrate to room temperature before the seal is opened. Opening a cold vial draws atmospheric moisture onto the lyophilised cake, and repeated condensation events can alter the material over time. A defined equilibration window in the laboratory procedure is more reliable than opening at whatever moment the vial is needed.

Storage and Inventory Records

Once released, stock should move to the designated storage temperature, commonly minus 20 degrees Celsius for lyophilised material, within a stated window after receipt. Practical points that protect the material include avoiding frost accumulation in the freezer and keeping door openings brief and purposeful.

Storage records should allow a complete reconstruction of what happened to each vial.

• Date and time of each transfer between storage states.
• Operator initials for every entry and every removal.
• Instrument readings: freezer temperature, logger values, any monitoring observations.
• Segregated storage so that lots and projects do not become mixed.
• Deviation and excursion reports, raised whenever a temperature limit is breached or a record is missing.

An excursion does not automatically mean the material is unusable for research, but the event must be documented, assessed and closed rather than omitted. A record with gaps is less useful than a record that shows a problem and the response to it.

Outbound Handling by the Supplier

The receiving checklist is only as good as the shipping practice behind it. On the outbound side, orders placed before 11:00 SAST are processed the same day, and cold-chain insulated packaging is used with the appropriate phase-change material for the expected transit time. Dispatch is from South Africa, with nationwide courier delivery at R250, and courier costs are waived on orders over R3,000. Delivery is quoted in South African Rand.

Note that a single temperature excursion during transit may not be reflected in the condition of the packaging by the time the parcel is opened. Where trace data is supplied, read it before the vials leave the receiving bench, and file it with the batch record.

Research use only. Not for human or veterinary consumption, diagnostic or therapeutic use.