Transporting dangerous goods by air freight is subject to strict international regulations designed to ensure the safety of everyone involved. While these regulations are complex, with proper preparation you can ship hazardous materials safely and legally via air freight.

What qualifies as dangerous goods in air freight?

Dangerous goods include all substances and items that may pose a risk to people, the environment, or transport equipment during shipment.

The International Civil Aviation Organization (ICAO) classifies these materials into nine main classes:

• explosive substances
• gases
• flammable liquids
• flammable solids
• oxidizing substances
• toxic and infectious substances
• radioactive materials
• corrosive substances
• miscellaneous dangerous substances and articles

Many everyday products fall under these categories. Lithium batteries in electronic devices, perfumes with high alcohol content, certain chemicals, or even dry ice used for food cooling can be classified as dangerous goods.

If you regularly export technical equipment or chemical products, you should research the classification of your goods in advance.

IATA Dangerous Goods Regulations as the foundation

The IATA Dangerous Goods Regulations (DGR) form the regulatory framework for dangerous goods transport in air freight. These comprehensive regulations, spanning over 1,000 pages, are updated annually and contain detailed requirements for packaging, marking, documentation, and transport of each dangerous goods class.

Compliance with these regulations is not optional. Violations can lead to heavy penalties, flight bans, and in the worst case, accidents.

Airlines and freight forwarders therefore carefully verify that all requirements are met before accepting dangerous goods for transport.

Packaging and marking of dangerous goods

Proper packaging is absolutely essential for dangerous goods transport. Each dangerous goods class requires special, tested, and approved packaging. These must not only protect the goods themselves but also prevent hazardous substances from leaking or reacting with other materials.

Marking must be clear and complete. This includes the UN number of the substance, corresponding hazard labels, orientation arrows for liquid substances, and special markings depending on the dangerous goods class.

For example, a package containing corrosive chemicals requires different markings than a shipment of flammable liquids.

Incorrect or incomplete marking results in shipment rejection.

Documentation requirements and Shipper’s Declaration

For every dangerous goods shipment, you must complete a Shipper’s Declaration for Dangerous Goods. This document is your written declaration to the airline that you have complied with all regulations. Creating this document requires expertise, as all information must be accurate and complete.

In addition to the Shipper’s Declaration, you often need additional documents such as safety data sheets, analysis certificates, or regulatory approvals. For radioactive materials, for example, special transport permits from radiation protection authorities are required.

Complete documentation determines whether processing runs smoothly or results in costly delays.

Staff training and certification

All personnel handling dangerous goods must be appropriately trained and certified. This applies not only to your own employees who package and declare dangerous goods but also to freight forwarder staff, airline personnel, and ground handling company employees at the airport.

IATA training is organized by function. While a shipper needs basic knowledge of classification and packaging, air freight personnel must additionally master acceptance and loading regulations. These certificates have time limits and must be renewed regularly.

Special requirements for different dangerous goods classes

Each dangerous goods class has specific requirements that you must observe. Class 1 explosive substances are generally prohibited from transport on passenger aircraft and may only be transported on dedicated cargo aircraft. Radioactive materials require not only special packaging but also compliance with dose limits for crew members.

Lithium batteries are particularly complex. Defective or damaged batteries are completely excluded from air transport, while intact batteries are subject to different regulations depending on type and watt-hours. A shipment of lithium metal batteries exceeding 2 grams lithium content must be handled differently than one with smaller lithium-ion batteries under 100 watt-hours.

Quantity limitations and loading restrictions

Most dangerous goods are subject to quantity limitations per package and per aircraft. These limits differ significantly between passenger and cargo aircraft. What can be transported without problems in a cargo aircraft may exceed the limits for passenger aircraft by several times.

Quantity limitations serve to minimize risk. They are based on scientific analyses and consider both the properties of the dangerous goods and the special conditions aboard an aircraft.

Airlines and freight forwarders must strictly observe these limits and cannot exceed them even at customer request.

Costs and surcharges for dangerous goods transport

Dangerous goods transports are more expensive and subject to surcharges. Airlines impose special dangerous goods surcharges that can often amount to several times the normal air freight rate. Additional costs include required special documentation, staff certification, and potential storage fees for delays.

You should definitely factor these costs into your export price calculations, as they can represent a significant portion of total transport costs.

Prohibited and restricted dangerous goods

Not all dangerous goods may be transported in aircraft. IATA maintains an extensive list of substances that are fundamentally excluded from air transport. These include highly explosive materials, certain toxic gases and substances that spontaneously ignite or can develop explosive vapors.

Other dangerous goods are subject to special restrictions or can only be transported under very strict conditions. If you are uncertain whether your product is suitable for air transport, you should clarify this in advance with a certified dangerous goods expert.

Subsequent rejection at the airport leads to costly delays and can severely impact your supply chain.

Role of air freight forwarders in dangerous goods transport

A specialized air freight forwarder can significantly simplify dangerous goods transport for you. Experienced forwarders have certified dangerous goods experts who can correctly classify, package, and document your goods. They know current regulations and have experience with various airlines and their specific requirements.

The forwarder handles not only technical processing but also communication with authorities and airlines.

They ensure that all required permits are available and that shipments comply with regulations. This expertise is particularly valuable when you only occasionally ship dangerous goods or work with new product categories.

Liability and insurance for dangerous goods transport

Special liability rules apply to dangerous goods transport. As a shipper, you bear responsibility for proper classification, packaging, and declaration of your goods.

Errors in this area can lead to high damage claims if your dangerous goods cause personal injury or property damage.

Standard transport insurance often excludes damage caused by improperly declared or packaged dangerous goods. You should therefore check whether your existing insurance provides adequate protection or whether you need special dangerous goods liability insurance.

Practical recommendations for dangerous goods transport

1. Start planning dangerous goods transports early. Procuring the right packaging, creating documentation, and booking with airlines often takes longer than normal air freight. Therefore, build sufficient lead time into your shipping planning.

2. Invest in staff training or work with specialized service providers. The costs for proper handling are usually significantly lower than potential consequential costs from errors. Document all steps carefully and retain records for potential inquiries.

3. Stay regularly informed about regulatory changes. IATA regulations are updated annually, and national authorities can also introduce additional requirements. Continuous education of your staff or collaboration with an experienced logistics partner helps you stay current.