| Flammable liquids | UN 1170 UN 1263 | Class 3 | Use UN-specification combination or single packaging approved for the assigned packing group. The inner container must be compatible with the liquid, and closures must be secured against leakage. | Class 3 flammable-liquid label; proper shipping name; UN number; orientation arrows where required; shipper and consignee details. | Bonded or grounded transfer equipment, non-sparking tools, spill kit, chemical-resistant gloves, and appropriate fire extinguisher. | International air, sea, road, and rail dangerous-goods rules, depending on the transport mode and route. | Confirm flash point, packing group, quantity limits, compatibility, and package performance certification before dispatch. |
| Corrosive liquids | UN 1789 UN 1824 | Class 8 | Use corrosion-resistant UN performance packaging with leakproof inner receptacles, secure closures, and suitable absorbent material when required by the packing instruction. | Class 8 corrosive label; UN number; proper shipping name; orientation arrows for liquids; additional environmental or subsidiary-risk marks where applicable. | Face shield, chemical-resistant gloves, protective apron, compatible pallet, drum-handling equipment, and emergency eyewash access. | Air, sea, road, and rail dangerous-goods regulations applicable to the shipment route. | Verify chemical compatibility with the packaging material, closure integrity, net quantity, and segregation from incompatible substances. |
| Lithium-ion batteries | UN 3480 UN 3481 | Class 9 | Use strong outer packaging that prevents movement and short circuit. Terminals must be protected, and damaged, defective, or recalled batteries require special controls and may be prohibited by air. | Class 9 lithium-battery label or applicable lithium-battery mark; UN number; handling label where required; cargo-aircraft-only marking when applicable. | Insulated tools, non-conductive separators, fire-resistant containment appropriate to the risk assessment, battery carts, and protective gloves. | Air dangerous-goods rules, maritime dangerous-goods rules, and national or regional road regulations. | Check watt-hour rating, state-of-charge limits, battery condition, test-summary availability, and the exact packing instruction for the transport mode. |
| Dry ice used as refrigerant | UN 1845 | Class 9 for air transport | Use packaging that allows carbon dioxide gas to vent. Do not place dry ice in an airtight container. The contents must be protected from shifting and direct contact when necessary. | “Dry ice” or “Carbon dioxide, solid”; UN 1845; net mass of dry ice in kilograms; Class 9 label for air shipments when required. | Insulated gloves, ventilation monitoring where applicable, gas detector for enclosed areas, ventilated transport carts, and warning signage. | Air transport dangerous-goods rules; additional carrier, workplace, and destination-country requirements may apply. | Record the net dry-ice mass, confirm ventilation, and assess carbon-dioxide accumulation in aircraft holds, vehicles, and storage rooms. |
| Compressed gases | UN 1001 UN 1072 UN 1013 | Class 2.1, 2.2, or 2.3 | Use approved pressure receptacles with valid inspection dates, valve protection, and suitable caps. Cylinders must be secured upright unless the applicable instruction permits another position. | Gas hazard label; UN number; proper shipping name; orientation arrows where required; subsidiary-risk labels when applicable. | Cylinder trolley, valve guards, restraint chains, leak-detection equipment, ventilation, and non-sparking handling tools. | Air, sea, road, and rail regulations, including pressure-vessel inspection requirements. | Confirm cylinder service date, valve condition, filling pressure, gas identity, segregation rules, and ventilation controls. |
| Infectious substances | UN 2814 UN 2900 UN 3373 | Class 6.2 | Use the applicable triple-packaging system: leakproof primary receptacle, leakproof secondary packaging, and rigid outer packaging. Absorbent material is required for liquid contents in many packing instructions. | Class 6.2 infectious-substance label for Category A; UN 3373 mark for Biological Substance, Category B; orientation arrows for liquids where required. | Sealed secondary containment, biological spill kit, disposable protective clothing, validated cold-chain equipment, and hands-free carts. | Air dangerous-goods rules, public-health requirements, and national regulations for biological materials. | Verify classification, packaging instruction, temperature range, emergency contact information, and trained personnel sign-off. |
| Radioactive material | UN 2915 UN 3332 | Class 7 | Use packaging authorized for the material, activity, transport index, and package category. Some shipments require a certified package design and competent-authority approval. | Class 7 label; package category; contents and activity; transport index where applicable; UN number; orientation arrows for liquids when required. | Radiation survey meter, secured package trolley, controlled-access storage, dosimeters, and handling equipment designated for radiation work. | International regulations based on the IAEA safety framework, together with mode-specific and national requirements. | Confirm package approval, radiation level, contamination limits, transport index, documentation, and separation distances. |
| Environmentally hazardous substances | UN 3077 UN 3082 | Class 9 | Use packaging that prevents release during normal transport and is compatible with the substance. Additional packing requirements may apply based on physical and chemical properties. | Class 9 label where applicable; environmentally hazardous substance mark; UN number; proper shipping name; orientation arrows for liquids when required. | Spill containment pallets, absorbent materials, chemical-resistant gloves, sealed transfer containers, and drain protection covers. | Air, sea, road, and rail dangerous-goods rules, plus environmental regulations at origin, transit, and destination. | Check marine-pollutant status, quantity thresholds, package integrity, spill response plan, and waste-disposal obligations. |
| Mixed dangerous-goods shipment | Multiple UN numbers | Multiple classes | Pack each substance according to its specific packing instruction. Use tested combination packaging, internal segregation, cushioning, and absorbent material where required. | All applicable hazard labels, handling marks, UN numbers, orientation arrows, overpack mark, and other mode-specific marks. | Dangerous-goods inspection station, barcode or document scanner, pallet restraint system, spill kit, and class-compatible storage areas. | Use the rules for the selected transport mode, including applicable air, maritime, road, rail, and national provisions. | Perform a compatibility and segregation review; verify declaration, labels, package certificates, quantity limits, and emergency information. |
| Overpack or palletized shipment | Same as inner packages | Same as inner packages | Ensure the overpack is structurally suitable, protects the inner packages, and does not conceal required labels or marks unless they are reproduced on the outside. | Display “OVERPACK” when required; reproduce hazard labels and UN numbers if not visible; show orientation arrows and other required marks. | Load-rated pallet, corner protection, stretch wrap or banding suitable for the cargo, forklift with approved capacity, and load-securing straps. | Mode-specific dangerous-goods rules and applicable cargo-securing requirements. | Inspect for hidden labels, package movement, damaged cartons, uneven weight distribution, and securement deficiencies before handover. |
| Documentation and final release | Shipment-specific | Shipment-specific | Packaging must match the declared substance, quantity, packing group, transport mode, and applicable performance standard. | Labels and marks must be durable, legible, correctly positioned, and resistant to weather and handling conditions. | Document scanner, calibrated weighing scale, label inspection checklist, secure staging area, and emergency-response information. | Applicable dangerous-goods regulations for the complete origin-to-destination route. | Release only after trained personnel verify classification, packaging, marks, documents, quantity, and route restrictions. |