How To Apply UN 1845 Marking For Warehouse And Carrier Operations

UN 1845 Marking The UN identification marking for carbon dioxide, solid, commonly known as dry ice.

Applying the UN 1845 Marking correctly in a warehouse or carrier environment reduces safety risks and avoids shipment delays or regulatory penalties. The marking is both a communication tool and a compliance element: it signals off-gassing risk, cryogenic temperatures, and informs stowage, loading, and emergency response decisions.

Where To Place The Marking

Place markings where they remain visible after palletization, banding, and shrink-wrap. Best practice is to mark at least two opposing faces of the package at a height and orientation readable by handlers and automated scanners. For pallet loads, add pallet-level markings that repeat the UN number and shipper contact details.

What To Include On The Package

• UN Number And Proper Name: "UN 1845" and "Carbon dioxide, solid (dry ice)" or the accepted abbreviation.
• Net Quantity: For air and many carrier rules, include the weight of dry ice in kilograms per package.
• Handling Advisory: A short instruction such as "Ventilate During Handling" or a standard dry ice handling label when required.
• Emergency Contact: Shipper phone number or emergency response information is useful and sometimes required on transport documentation.

Warehouse Storage And Staging

Store dry ice outbound pallets in a ventilated, low-occupancy staging area away from populated office spaces and enclosed rooms. Keep packages off the ground on pallets and avoid stacking heavy loads on top of dry ice packages to limit crushing and potential containment failure. Update warehouse management system (WMS) item attributes to flag SKUs that require UN 1845 handling.

Carrier Handling And Loading

Before tender, confirm the carrier's acceptance policies and any label or documentation they require. Communicate to drivers and load planners the location of dry ice pallets, the approximate off-gassing duration, and special stowage needs (for example, avoiding enclosed trailers without ventilation). For multi-modal moves, ensure the documentation and markings meet the most restrictive mode requirements in the itinerary.

Packing Tips For Marking Durability

• Weatherproof Labels: Use durable, tear- and water-resistant labels or stencils that remain legible during transit.
• Redundant Marking: Apply markings on more than one face and on pallet-level documentation so markings are visible after consolidation.
• Barcode/Scan Integration: Link the UN 1845 designation to WMS scans so inbound/outbound scans trigger handling prompts for ventilated staging or PPE.

Training And SOPs

Include UN 1845-specific procedures in facility SOPs and training: how to recognize the marking, required PPE (insulated gloves and eye protection), emergency ventilation steps, first-aid for cold burns, and documentation requirements. Periodic audits of outbound pallets for correct marking and net weight accuracy prevent noncompliance before tendering to carriers.

Example Implementation

A contract fulfillment centre handles refrigerated kits shipped on dry ice. They added a dry-ice SKU flag in the WMS which triggers packing station prompts to apply a pre-printed "UN 1845 — Carbon dioxide, solid (dry ice)" label, a printed net weight sticker, and an outer package handling label. Outbound manifests list the UN number and net weights per carton. During loading, foremen assign dry ice pallets to ventilated loading docks and brief drivers on off-gassing and estimated sublimation time.

In short, the UN 1845 Marking is a practical, regulatory, and safety control. Consistent placement, durable labeling, WMS integration, and staff training ensure that packages containing dry ice are handled, staged, and transported safely and in compliance across warehouse and carrier operations.