Receiving Checklist: Verifying The Biological Substance Category B Mark

Biological Substance Category B Mark A package marking used for shipments classified as Biological Substance, Category B.

Receiving facilities, laboratory intake points, and warehouse docks must quickly verify that incoming UN3373 packages are marked and documented correctly before acceptance. A standardized verifying process reduces risk to staff, prevents improper storage, and ensures traceability of potentially infectious materials.

First Visual Check On Arrival

When packages arrive at the dock or receiving counter, staff should perform an immediate visual inspection without opening the package. Key items to verify at first glance include:

• Mark Presence: Confirm the "UN3373" reference and "Biological Substance, Category B" text or equivalent marking is visible on the outer package.
• Label Integrity: Check the label for smearing, peeling, or damage that could obscure the marking.
• External Damage: Notice any signs of crushing, wetness, leakage, or other damage that indicate a possible containment failure.

Detailed Acceptance Checks

If the initial check passes, proceed to a more detailed acceptance routine while following your facility’s SOPs and safety procedures (use PPE and, if required, accept in a designated area):

• Documentation Match: Verify the waybill or delivery note references UN3373/Category B and matches the recipient and contents described.
• Label Placement: Ensure the mark is on an appropriate panel and not confused with other hazard labels.
• Carrier Acceptance Stamp: Note any carrier acceptance stamps or signatures that confirm prior checks.
• Integrity Check: If permitted by SOPs, inspect secondary packaging through visual cues only — do not open unless trained and authorized.

Actions If The Mark Is Missing Or Damaged

If the mark is absent, illegible, or the package shows damage, follow these steps:

• Do Not Accept: Refuse acceptance and document the reason if regulatory or carrier rules require refusal for noncompliant packaging.
• Isolate The Package: Place the package in a designated quarantine area away from routine traffic to minimize exposure risk.
• Notify Stakeholders: Contact the shipper, carrier, and receiving laboratory or supervisor immediately to report the discrepancy and receive instructions.
• Record Keeping: Photograph the package and label condition and log the incident in the facility’s receiving records for traceability and incident follow‑up.

Documentation And Traceability

Maintain clear records linking the physical package to transport documentation:

• Acceptance Record: Log the date/time, carrier, tracking number, condition, and accepting personnel for each UN3373 package.
• Retention: Keep copies of waybills, declarations, and photos according to facility retention policies and regulatory requirements.
• Incident Reports: File an incident report for any damage or marking noncompliance and follow escalation procedures with the carrier and shippers.

Training And SOP Integration

Receiving staff must be trained to recognize the mark and to follow SOPs for incoming infectious substances. Training should cover:

• Mark Recognition: Visual identification of the Category B mark and the UN3373 reference.
• Immediate Actions: Steps for acceptance, quarantine, refusal, and documentation.
• PPE And Hygiene: Appropriate personal protective equipment and hygiene measures during inspection and handling.

Example Receiving Workflow

A hospital laboratory’s receiving clerk scans the carrier waybill and performs a hands‑off visual check. The clerk confirms the outer packaging bears "UN3373, Biological Substance, Category B" and that the label is intact. They log the shipment into the LIS (laboratory information system), sign the carrier’s delivery receipt, and move the package to the designated intake refrigerator for processing by trained staff. If the label had been missing, they would have quarantined the package, photographed the condition, and notified the lab supervisor and carrier.

In short, the Biological Substance Category B Mark is the frontline indicator for safe receipt of UN3373 shipments. A consistent visual and documentation checklist, supported by staff training and clear SOPs, ensures safe acceptance, traceability, and regulatory compliance.