Dangerous Goods by Air

Dangerous goods by air is the regulated category encompassing hazardous materials — substances and articles that pose a risk to health, safety, property, or the environment — whose transport by aircraft is either restricted or prohibited without strict compliance with international packaging, labeling, documentation, and training requirements. The regime is among the most rigorously enforced in all of aviation.

What Is Dangerous Goods by Air?

IATA's Dangerous Goods Regulations (DGR), derived from the United Nations Model Regulations and ICAO Technical Instructions (Annex 18), classify hazardous materials into nine classes: explosives, gases, flammable liquids, flammable solids, oxidizing substances, toxic and infectious substances, radioactive materials, corrosives, and miscellaneous dangerous goods. Each class is subdivided into packing groups (I, II, III) reflecting hazard severity. Some substances — such as certain explosives and disease-causing pathogens — are forbidden absolutely from air transport. Others are permitted under strict conditions governing packaging type, quantity per package, and segregation from other cargo and passengers.

How It Works in Practice

Shippers must identify whether their goods contain dangerous goods, classify them correctly, select UN-specification packaging, apply required hazard labels and UN marks, complete a Shipper's Declaration for Dangerous Goods (the formal DG declaration equivalent to the AWB for dangerous goods), and hand the shipment only to trained acceptance staff. Airlines must train all cargo acceptance employees in DGR recognition and compliance. The cargo management system checks dangerous goods declarations against aircraft and route restrictions — certain aircraft types, or passenger versus cargo-only operations, impose different quantity limits. On board, dangerous goods must be stowed in designated positions away from passengers and crew rest areas, and in some cases require specific segregation from incompatible materials.

Why It Matters

The consequences of dangerous goods incidents in aviation are severe. A lithium battery fire in a cargo hold is one of the most feared scenarios in modern aviation because suppression systems were not designed to handle thermal runaway. UPS Airlines Flight 6 (2010) and Asiana Airlines Flight 991 (2011) were both fatal cargo fires linked in part to lithium battery shipments. The regulatory framework exists because the consequences of misclassification or mislabeling can be catastrophic. IATA's DGR is updated annually to reflect new substances, packaging research, and incident learnings.

Key Facts and Figures

• IATA's Dangerous Goods Regulations manual runs to over 1,000 pages and is updated every year; the 2024 edition is the 65th annual edition
• Lithium batteries are the single largest DG compliance challenge: billions of consumer devices and electric vehicle battery packs ship by air each year
• Hidden dangerous goods — undeclared shipments that contain hazardous materials — are responsible for an estimated 20 to 25 percent of cargo-related incidents annually
• Airlines may impose restrictions beyond IATA DGR minimums (known as State and Operator Variations), further limiting certain commodities
• Training requirements mandate initial DGR training and biennial recurrent training for all personnel handling, accepting, or loading dangerous goods

Related Concepts

Air Waybill, Unit Load Device, Cargo Screening, IATA Cargo Standards, Cargo Ground Handler