Shipping dangerous goods and hazardous materials
Knowing which class your goods fall under and what quantity limits apply helps you determine the required documentation, packaging and labelling.
What are dangerous goods?
Dangerous or hazardous goods are items or substances that could pose risks to health, safety or the environment, particularly if they are not handled or packed properly. Lithium batteries, for example, can easily overheat and ignite in certain circumstances.
Dangerous goods can be solids, liquids or gases, and may be pure chemicals, mixtures of substances, manufactured products or individual articles. They are classified according to the type of potential hazard, e.g. flammable, poisonous, explosive, radioactive etc.
The United Nations (UN) has a universal system for the classification, packaging, marking and labelling of dangerous goods to facilitate their safe transport.
There are nine classes of dangerous goods, plus a few sub-classes. Dangerous goods are named with specific UN numbers that must be used in the declaration form and in the packing and labelling.
Dangerous goods can be solids, liquids or gases, and may be pure chemicals, mixtures of substances, manufactured products or individual articles. They are classified according to the type of potential hazard, e.g. flammable, poisonous, explosive, radioactive etc.
The United Nations (UN) has a universal system for the classification, packaging, marking and labelling of dangerous goods to facilitate their safe transport.
There are nine classes of dangerous goods, plus a few sub-classes. Dangerous goods are named with specific UN numbers that must be used in the declaration form and in the packing and labelling.
Classes of dangerous goods
| Class | Type of material | Examples |
| 1 | Explosive substances and articles | Fireworks, flares, arms and ammunition |
| 2.1 | Flammable gas (e.g. butane) | Butane, aerosols, camping gas, lighters, liquefied gas, acetylene for welding, ethylene for ripening fruits, hydrogen for industrial use |
| 2.2 | Non-flammable and non-toxic gases which could cause asphyxiation (e.g. nitrogen, helium, carbon dioxide) or oxidisers (e.g. oxygen) |
Nitrogen, helium, argon, carbon dioxide, oxygen, compressed oxygen, fire extinguishers, refrigerant gas |
| 2.3 | Toxic gases (e.g. chlorine, phosgene) | Chlorine, phosgene, oxygen difluoride, ammonia for industrial freeing, methyl bromide and ethylene oxide for fumigation |
| 3 | Flammable liquids (e.g. lighter fluid, petrol) | Lighter fluid, petrol, solvents, paints, varnish, perfume, adhesives, resin solution, printing ink, dry cleaning fluids |
| 4.1 | Flammable solids, self-reactive substances and solid desensitised explosives | Self-reactive substances, solid desensitised explosives, matches, sulphur powder, camphor, naphthalene balls |
| 4.2 | Substances liable to spontaneous combustion | Phosphorus, copra, fish meal |
| 4.3 | Substances which, in contact with water, emit flammable gases | Calcium carbide, sodium, ferrosilicon and potassium metals |
| 5.1 | Oxidising substances | Calcium hypochlorite, hydrogen peroxide, fertilisers, hair colouring |
| 5.2 | Organic peroxides | Hardeners, fibreglass repair kits |
| 6.1 | Toxic substances | Pesticides, sodium cyanide for metal treatment, chromium salt for electroplating |
| 6.2 | Infectious substances | Blood samples, medical samples, biological substances derived from living organisms |
| 7 | Radioactive material | Smoke detectors, substances for sterilisation of medical products |
| 8 | Corrosive substances | Bleach, drain cleaner, dishwasher tablets, acetic acid, citric acid, caustic soda, car and truck batteries |
| 9 | Miscellaneous dangerous substances and articles | Lithium batteries, magnets, dry ice |
Importance of moving dangerous goods safely
It is important to know if you are moving dangerous goods – sometimes called hazardous materials – which can pose a risk to people, animals or the environment if not properly handled in use or during transit.
Non-compliance with dangerous goods transport regulations can be costly with fines being imposed for improper declarations.
Regulations were tightened in 2009 after several serious fire incidents. So, it goes without saying: moving dangerous goods requires both careful planning and specialised knowledge.
Quantity limits
Some everyday consumer goods – food flavourings, perfume, soaps, detergents, cosmetics, dyes, paints and plastics – may be classed as “dangerous” or “hazardous”, if certain quantity limits are exceeded, or if specific packaging is used.
A perfume spray that fits into a travel bag may seem harmless, but a huge shipment of perfume bottles is potentially hazardous.
Quantity limits for safe transport are listed in column 7a of the “Dangerous goods list” in part 3 of ADR and the IMDG Code (see regulations below).
For certain goods, the limit in column 7a of Table A is zero, which means that those goods may not be shipped in limited quantities, i.e. the dangerous goods rules apply regardless of the quantity in the shipment.
Determine the class of dangerous goods and the quantity limits involved. The specific class of dangerous goods, and the quantity to be shipped, affects how they must be declared, packaged, labelled and transported.
Regulations for the transport of dangerous goods
National and international regulations governing the transport of dangerous goods are all based on the UN classification system. These regulations are generally structured by the mode of transport:
- Air: International Air Transport Association (IATA) Dangerous Goods Regulations (DGR)
- Sea: International Maritime Dangerous Goods (IMDG) Code
- Road: National Road Traffic (NRT) Act
- Rail: Appendix C of the Convention covering International Carriage by Rail (COTIF) – Regulations concerning the International Carriage of Dangerous Goods by Rail (RID)
More sources:
- United Nations Economic Commission for Europe (UNECE): Dangerous Goods
Check if your goods may be shipped by all modes of transport and how, especially when planning multimodal shipments, e.g. onward transportation from ports or airports by road or rail.
Trained personnel
Regulations require employees dealing with dangerous goods to complete appropriate training. Employees who deal with dangerous goods include those who:
- Load and unload or handle dangerous materials/goods
- Prepare dangerous materials/goods for transportation
- Operate vehicles used to transport dangerous materials/goods
- Design, manufacture, fabricate, inspect, recondition, maintain, repair or test packages or packaging components used to transport hazardous materials
If you ship goods internationally, check if you are required to have a dangerous goods safety adviser (DGSA). This may not be necessary if you:
- Only transport dangerous goods in “limited quantities”
- Only occasionally engage in the carriage, loading or unloading of dangerous goods posing low risk
Ensure that your employees and the employees of your service providers have completed appropriate health and safety training for the transport of dangerous goods.
Documentation and paperwork
Proper documentation is a must for all dangerous goods shipments. Missing documents or hidden errors could cause shipment delays – or worse, serious incidents.
Document checklist
- Dangerous Goods Note/Declaration: This is a legal requirement for transporting goods by air or sea. The person responsible for signing the Dangerous Goods Note/Declaration is required by law to have completed the appropriate training.
- Materials safety data sheet (MSDS): Can be obtained from the original manufacturer. Not always required, but may be asked for as part of the booking procedure.
- Commercial invoice
- Tremcard
- Packing list
- Shipper’s letter of instruction
- Certificate of origin: sometimes required
- Additional documents that may be needed: Weathering Certificate, Certificate of Analysis (CoA), Competent Authority Approval (CAA)
The person responsible for signing the ‘Dangerous Goods Declaration’ is required by law to have had the appropriate training.
Non-compliance can be costly and there have been cases where companies were penalised for incorrect paperwork
Check that you have all the proper documents in place when shipping dangerous goods. Involve the recipient, by giving all details prior to the shipment, to enable them to work with local agencies in the destination country and ensure a smooth process.
Know when your responsibilities as a shipper start and end. Check out DSV’s expert insights on Incoterms.
Packaging and labelling
Under the UN classification system for dangerous goods, approved boxes and labels with the legally required markings must be used to facilitate safe transport.
The regulations require that packaging must meet or exceed minimum standards of performance before it can be authorised for the carriage of dangerous goods. The maximum weight is 30kg for outer packaging, or 20kg for shrink-wrapped trays. The maximum weight for the individual containers depends on the type of goods.
Dangerous goods shipped in limited quantities may only be packed in inner packaging placed in suitable outer packaging.
Freight forwarders and logistics providers can assist with the transport of dangerous goods. They have trained personnel and the benefit of practical knowledge and experience. They can build on their good relations with airlines and shipping lines and are able to secure priority space for dangerous/hazardous shipments. Remember though, that it is ultimately the customer who holds legal liability. Be sure that your documentation is in order and that you comply with all laws and regulations when shipping dangerous goods.
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