TDG Regulations in Canada: What Shippers Need to Know About Transporting Dangerous Goods

If your freight includes anything that can burn, corrode, poison, pressurize, or react badly with the wrong neighbor on a trailer, Canada’s Transportation of Dangerous Goods framework probably applies to you, whether you ship it every week or once a year. A surprising number of shippers only find this out when a carrier turns down a load or a Transport Canada inspector asks for paperwork nobody prepared.

This guide walks through what TDG actually requires in Canada: who it applies to, how the nine hazard classes work, what has to be on a shipping document, when a shipment might qualify for an exemption, and what happens if something gets missed. It’s written for manufacturers, distributors, and logistics teams who need to move regulated freight by truck, not for people studying for a TDG certification exam.

What is TDG in Canada? The Transportation of Dangerous Goods (TDG) Act and Regulations are federal rules, administered by Transport Canada, that govern how hazardous materials are classified, packaged, labelled, documented, and transported by road, rail, air, and water. They apply to businesses and, in some cases, to individuals moving things like propane or gasoline for personal use.

What Actually Counts as a Dangerous Good

A lot of shippers assume “dangerous goods” means something exotic. In practice, it covers plenty of ordinary commercial products. A product is regulated under the TDG Regulations when one of two things is true: it’s listed by name in Schedule 1 or Schedule 3 of the regulations, or it isn’t listed but still meets one of the classification criteria set out in Part 2.

Paint, cleaning chemicals, batteries, aerosol cans, adhesives, pool chemicals, compressed gas cylinders, dry ice, and fertilizer can all qualify. So can raw materials used in manufacturing and chemical production. If you’re not sure whether something you ship is regulated, check the product label for words like flammable, corrosive, toxic, oxidizer, compressed gas, or reactive, or ask the manufacturer for a proof of classification document. A safety data sheet’s Section 14 sometimes lists the TDG classification, though under WHMIS rules that section isn’t mandatory, so don’t assume it will be there.

Three conditions have to line up before the regulations actually apply to a specific move: the product meets the definition of a dangerous good, it doesn’t fall under one of the special case or special provision exemptions, and it’s being transported outside the boundaries of a single facility. Move a drum of solvent from one building to another on the same property and TDG generally doesn’t apply. Put that same drum on a truck bound for a customer and it does.

Certain sectors run into TDG constantly rather than occasionally: chemical manufacturing, industrial gas suppliers, oil and gas, agriculture (fertilizers, pesticides, anhydrous ammonia), and any business shipping batteries, aerosols, or paints as part of its regular product line. If your business touches any of these, TDG compliance is worth building into your shipping process rather than handling case by case.

One distinction worth making early: a TDG hazard class is not the same thing as an NMFC freight class. The first is a federal safety classification tied to what the product actually is and how it behaves. The second is a pricing classification used for LTL freight rating, and the two numbers rarely have anything to do with each other. Mixing them up on a shipping document is a common and avoidable error.

If dangerous goods sit in your warehousing and distribution facility before they ship, the same classification and segregation logic applies to how they’re stored, not just how they travel, even though TDG itself generally stops applying once goods are inside a single facility’s boundary.

Who’s on the Hook: Consignor, Carrier, Consignee

TDG spreads responsibility across three roles, and it helps to know which one your business plays on a given shipment.

Classification is squarely the consignor’s job, even though a carrier or a consignee can share liability if something goes wrong downstream. If you’re a distributor re-shipping a product you didn’t manufacture, you still need to make sure it’s correctly classified before it goes out again. Contact the original manufacturer for the classification if you don’t already have it on file, since guessing is not a defensible position with an inspector.

The Nine TDG Hazard Classes

Every regulated dangerous good falls into one of nine classes, and the class drives almost everything downstream: packaging standards, the marks required on the container, segregation rules, and whether an emergency response plan is needed.

Class 9 deserves a second look because it catches a lot of shippers off guard. Lithium batteries, whether standalone or packed inside equipment, fall under Class 9 and have their own packaging and labelling rules. If your product line includes anything battery-powered, that’s worth confirming with your supplier rather than assuming it ships like ordinary freight.

Packaging, Labels, and Placards

Once a product is classified, the next question is what kind of container it can travel in and what has to be visible on the outside of it. Canada’s packaging standards largely mirror the United Nations Recommendations, so UN-certified containment is recognized here and in most other countries. Some containers carry a Canada-specific “TC” marking instead, and a container marked “TC/DOT” meets both Canadian and American specifications, which matters for cross-border loads.

The size of the container decides whether you need a label or a placard. A small means of containment, generally 450 litres or less, needs a label. Anything larger than 450 litres needs a placard. The specific label or placard design depends on the hazard class, and the exact colours, shapes, and dimensions are set out in Part 4 of the TDG Regulations.

When goods from different classes end up on the same load, segregation rules kick in. Incompatible substances, flammable liquids and corrosives being a common example, can’t be loaded so they’re in contact with each other, and in some cases they need to be physically isolated within the same trailer. This is one of the more overlooked parts of TDG for shippers consolidating LTL shipments, since a single trailer often carries freight from several different consignors. The same segregation logic carries over when a shipment moves by intermodal rail and truck combinations, since dangerous goods rules apply across every mode in the move, not just the highway leg.

The Shipping Document: What Has to Be On It

Unlike a standard bill of lading, a TDG shipping document has a specific, non-negotiable set of fields. It can’t be an electronic-only record either, unless the carrier holds an equivalency certificate that specifically permits electronic shipping documents. As a minimum, Part 3 of the TDG Regulations requires:

An ERAP reference number and telephone number are required in addition to the above whenever the shipment needs an emergency response assistance plan. The consignor prepares the document before the carrier ever takes possession of the freight, and the certification has to name an actual person, not just the company. A carrier who receives an incomplete or incorrect shipping document is within their rights to refuse the load or send it back to the consignor to fix.

Copies have to be kept for at least two years by the consignor, the carrier, and the Canadian importer, and paper or electronic retention both work for that requirement. On the road, the driver has to keep the document within reach in the cab, or in a door pocket if they’re out of the truck.

When You Might Be Exempt

Not every shipment that contains a dangerous good has to comply with the full weight of the regulations. TDG builds in “special case” and “special provision” exemptions for lower-risk situations, mostly involving small quantities. Two of the more commonly used ones are worth understanding in detail, because getting them wrong is its own compliance risk.

Both gross mass exemptions exclude a similar list of higher-risk goods regardless of quantity: anything requiring an ERAP, anything needing a control or emergency temperature, most Class 1 explosives, large flammable gas cylinders, toxic gases, top-tier flammable solids, and radioactive material requiring nuclear safety licensing. They also can’t be stacked on top of each other. A shipment claiming the 150 kg exemption can’t also claim the 500 kg exemption to cover the excess.

The exemptions only apply when every listed condition is met. Miss one condition, whether it’s a container that’s slightly over 30 kg or a total quantity a few kilograms over the cap, and the entire shipment falls back under the full TDG Regulations. This is exactly the kind of detail that trips up businesses that assume “small enough” is the same thing as “exempt.”

Training: Who Needs It and How Long It Lasts

Training is arguably the single most important part of TDG, since Transport Canada treats it as the foundation everything else rests on. Anyone who imports, offers for transport, handles, or transports dangerous goods needs training before doing so, unless they’re working under the direct, physical supervision of someone who already holds a valid certificate.

There’s no government-mandated course curriculum. Employers choose or build the training and are responsible for making sure it actually covers what an employee’s specific duties require, whether that’s classification, documentation, placarding, or handling. Once training is complete, the employer issues a certificate, even if an outside trainer delivered the course. Self-employed individuals issue their own certificate.

Certificates expire on a schedule tied to the mode of transport: 24 months for air transport, 36 months for everything else, including road. They aren’t transferable between employers, so someone working two jobs at once needs a certificate from each one. An employee has to be able to produce their certificate immediately if a TDG inspector asks for it during an inspection, and an employer has 15 days to hand over training records if requested.

Emergency Response: CANUTEC and ERAPs

Every dangerous goods shipment needs a way to get expert help fast if something goes wrong in transit. That’s the purpose of the 24-hour emergency number on the shipping document, and it’s why CANUTEC, Transport Canada’s 24/7 dangerous goods emergency centre, exists. In an emergency involving dangerous goods, anyone can call CANUTEC at 1-888-CAN-UTEC (226-8832), 613-996-6666, or *666 from a cellphone. Consignors can register to use CANUTEC’s number on their own shipping documents, provided they have written permission to do so.

Higher-risk shipments need more than a phone number. An Emergency Response Assistance Plan, or ERAP, is a formal plan approved in advance by Transport Canada for specific dangerous goods, transport modes, containers, and geographic areas. If your shipment requires one, that requirement is spelled out in Column 7 of Schedule 1, and the ERAP reference number and its own phone number both need to appear on the shipping document.

Businesses that don’t move ERAP-level quantities usually don’t need to think about this beyond confirming with their supplier or classification documentation that their shipment doesn’t trigger the requirement. If it does, the ERAP has to be approved and in place before that freight ever leaves the dock.

Crossing the Border: Canada-US Reciprocity

Businesses running cross-border freight between Canada and the United States get a fair amount of reciprocity, but not a blank pass. Transport Canada recognizes a HazMat endorsement on a US commercial driver’s licence, a specific US federal training certification, or a TDG training certificate as equivalent, and the reverse is also true: the US Department of Transportation’s Federal Motor Carrier Safety Administration accepts a Canadian TDG training certificate in place of a HazMat endorsement, subject to conditions in US federal regulations.

Labels and placards generally cross the border in both directions without a problem too, with one specific exception. American labels and placards are not accepted in Canada for Class 2.3 (toxic gases) and Class 6.1 (toxic substances). Those two classes need Canadian TDG-compliant marks regardless of where the shipment originated. If your freight includes goods in either of those classes, it’s worth confirming this with your carrier before the load crosses, since it’s an easy detail to miss when everything else about US and Canadian hazmat rules lines up.

A customs broker familiar with dangerous goods shipments can help confirm which side’s documentation and marking rules apply on a given lane, particularly for freight that starts in a US state with different labelling conventions. For the broader list of paperwork a first-time cross-border shipper needs beyond TDG documents, our cross-border freight checklist covers the rest of the paperwork trail.

What Happens If You Don’t Comply

TDG enforcement isn’t theoretical. Transport Canada’s TDG Program runs close to 6,000 planned and reactive inspections a year across the country, and the penalties for non-compliance are meaningful rather than symbolic.

Fines aside, a non-compliant shipment can be held at a dock or a border crossing while paperwork gets corrected, which turns a documentation gap into a delivery delay and, depending on the freight, a real cost. Insurance can also become a problem: carrier liability limits and cargo coverage assume the shipment complied with applicable regulations, and a claim tied to a TDG violation is a harder conversation with an insurer than one tied to ordinary transit damage. If you’re weighing how cargo insurance and carrier liability apply to regulated freight, it’s worth raising directly with your carrier and broker before you need to file a claim, not after.

Enforcement itself is split between the federal TDG Directorate and the provinces, which have their own parallel regulations that generally mirror the federal rules for road and rail transport within provincial boundaries. The TDG Directorate maintains a memorandum of understanding with each province and territory to coordinate enforcement, and the Canada Border Services Agency enforces compliance on shipments crossing into or out of the country. A held load at a border crossing or a dock, whether it’s stuck there for a TDG paperwork gap or any other reason, adds up in the same way we broke down in our piece on the real cost of late freight for manufacturers and distributors.

Everyday Products Shippers Forget Are Regulated

The gap between what people assume is a “hazmat shipment” and what TDG actually covers catches a lot of businesses off guard. A few categories worth double-checking if they show up anywhere in your supply chain:

• Lithium batteries. Standalone, packed with equipment, or built into a finished product, they fall under Class 9 and have specific packaging rules that differ by battery type and charge state.
• Aerosols. Spray paint, cleaning products, personal care aerosols, and similar consumer goods are classified as gases and regulated accordingly once shipped in commercial volume.
• Dry ice. Solid carbon dioxide is Class 9 and shows up constantly in food, pharmaceutical, and lab shipments that otherwise look like ordinary temperature-controlled freight. If you move perishable food across the border alongside dry ice packs, it’s worth reading alongside our guide on transporting food from Canada to the US.
• Industrial and pool chemicals. Chlorine products, pool acids, and cleaning concentrates commonly fall under Class 5 or Class 8.
• Fertilizers. Certain ammonium nitrate-based products are Class 5.1 oxidizers, which surprises agricultural shippers who think of fertilizer as an ordinary bulk commodity.
• Paints, adhesives, and solvents. Many are Class 3 flammable liquids based on their flash point, regardless of how they’re marketed at retail.

If any of these appear in a product line you manufacture or distribute, it’s worth confirming the TDG classification once, in writing, rather than re-deriving it every time a shipment goes out. A written proof of classification also protects you if a carrier or a customer asks for one later.

How This Plays Out for a Trucking Company

From a carrier’s side, TDG compliance is a gate that has to be checked before a trailer leaves the yard, not an afterthought handled once the truck is already loaded. That means confirming the shipping document matches what’s actually on the trailer, checking that placards or labels are correct for the classes and quantities involved, verifying that incompatible goods are properly segregated, and making sure drivers carry a valid TDG training certificate for the freight they’re hauling.

For shippers, the practical takeaway is that a carrier who asks detailed questions about your dangerous goods shipment before quoting it is doing you a favour, not creating friction. A carrier who doesn’t ask any questions at all is a bigger risk than a slightly longer quoting process. If dangerous goods are a regular part of your freight, whether through flatbed, dry van, or temperature-controlled lanes, it’s worth building the classification and documentation step into your own process early, so it isn’t a surprise at pickup.

Time-sensitive dangerous goods, a chemical batch a production line is waiting on, for instance, don’t get a pass on paperwork just because the shipment needs to move fast. If anything, a rushed expedited shipment is where a missing shipping document field is most likely to get overlooked, so it pays to have classification and documentation ready before the urgent call comes in rather than during it. Drivers hauling regulated freight are also still working within the same hours-of-service rules as any other load, so building in dock time for a TDG check shouldn’t come at the expense of a driver’s legal clock.

And if the same load happens to be oversized on top of being regulated, for example an industrial tank or a piece of process equipment shipped with residual product inside, you’re stacking TDG requirements on top of whatever oversize load permits the move already needs in Ontario.

RoadLINX moves dangerous goods shipments within the bounds of TDG classification and documentation that the consignor provides, and coordinates with shippers on packaging, marking, and customs requirements for cross-border loads. For a related look at hazmat shipments crossing into the US specifically, our guide on shipping hazardous materials from Canada to the US covers the cross-border side in more depth, while this guide focuses on the domestic TDG framework itself.

A Practical TDG Checklist Before You Ship

Ready to move a dangerous goods shipment or want to confirm what’s needed before you book it? Get in touch with RoadLINX and our dispatch team can walk through the classification, documentation, and lane details with you before anything is loaded.

Frequently Asked Questions

What is TDG in Canada?
TDG stands for Transportation of Dangerous Goods, a federal act and set of regulations administered by Transport Canada that govern how hazardous materials are classified, packaged, labelled, documented, and transported by road, rail, air, and water within and out of Canada.

Who has to comply with TDG regulations?
Anyone who imports, handles, offers for transport, or transports dangerous goods, including manufacturers, distributors, trucking companies, and consignees. Even members of the public transporting things like propane or gasoline for personal use fall under the rules, though many personal-use situations qualify for an exemption.

What are the 9 TDG hazard classes?
Explosives, gases, flammable liquids, flammable solids and reactive substances, oxidizers and organic peroxides, toxic and infectious substances, radioactive materials, corrosives, and a miscellaneous class that includes lithium batteries and dry ice.

Who decides if a product needs TDG classification?
The consignor or shipper is responsible for classification, though they can rely on classification already done by the manufacturer or a previous consignor. The consignor must still provide proof of classification to Transport Canada if asked.

What is a TDG shipping document, and how is it different from a bill of lading?
A TDG shipping document is a legally required record containing specific fields, including the UN number, shipping name, hazard class, packing group, quantity, and a 24-hour emergency contact. It serves a different regulatory purpose than a standard bill of lading and generally accompanies it rather than replacing it.

Do I always need a shipping document for dangerous goods?
A shipping document is required unless a specific exemption states otherwise. Even shipments using the 500 kg gross mass exemption still need a document or a simplified equivalent.

What is the 150 kg gross mass exemption?
It exempts retail-quantity dangerous goods, such as a gasoline jerrycan or a propane cylinder, from TDG entirely when the total gross mass is 150 kg or less, each container is 30 kg or less, and the shipment moves between a retailer and the end user or purchaser rather than through a commercial carrier.

What is the 500 kg exemption, and how is it different from the 150 kg exemption?
The 500 kg gross mass exemption applies to commercial shipments of small containers, up to 500 kg total on the vehicle, and reduces packaging and documentation requirements rather than eliminating them. It cannot be combined with the 150 kg exemption on the same shipment.

What is a limited quantity exemption?
It’s a special provision, listed against specific entries in Schedule 1 and detailed in Schedule 2, that reduces packaging and marking requirements for certain lower-hazard goods shipped in small consumer-style containers.

Do employees need TDG training even if they never drive the truck?
Yes. Anyone who classifies, packages, labels, documents, or otherwise handles dangerous goods before or after transport needs training, not just the driver behind the wheel.

How long is a TDG training certificate valid?
24 months for training related to air transport, and 36 months for every other mode, including road, which covers most trucking shipments.

Can a self-employed contractor issue their own TDG certificate?
Yes. A self-employed person can issue their own training certificate once they’ve genuinely completed the required training, since there’s no external certifying body for TDG in Canada.

What is CANUTEC?
CANUTEC is Transport Canada’s 24-hour dangerous goods emergency centre. Anyone can call 1-888-CAN-UTEC (226-8832) or 613-996-6666 in an emergency involving dangerous goods in transit.

What is an ERAP, and does my shipment need one?
An Emergency Response Assistance Plan is a pre-approved plan for responding to a release of certain higher-risk dangerous goods. Whether a specific product needs one is listed in Column 7 of Schedule 1 of the TDG Regulations; most ordinary commercial shipments don’t reach that threshold.

Is my Canadian TDG certificate recognized in the United States?
Yes. The US Federal Motor Carrier Safety Administration accepts a Canadian TDG training certificate in place of a HazMat endorsement, subject to conditions set out in US federal regulations.

Do American hazmat placards work on shipments coming into Canada?
Generally yes, with one notable exception: labels and placards for Class 2.3 (toxic gases) and Class 6.1 (toxic substances) must meet Canadian TDG requirements specifically, regardless of where the shipment originated.

What are the penalties for a TDG violation?
Under the TDG Act, a first offence can carry a fine of up to $50,000, subsequent offences up to $100,000, and indictable offences can carry up to two years of imprisonment in addition to fines.

How long do I need to keep TDG shipping documents?
At least two years, and the consignor, the carrier, and the Canadian importer are all separately required to retain copies.

Are TDG regulations federal, provincial, or both?
Both. The federal TDG Act and Regulations set the baseline, and provinces have their own parallel regulations that generally mirror the federal rules for road and rail transport within provincial boundaries. Enforcement is coordinated between the federal TDG Directorate and each province.

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Editor’s note: this article includes three images generated for this post.

• Featured/hero image: tdg-regulated-trucking-yard-ontario.png, 2560x1429px, PNG, unmarked dry van tractor-trailer at a GTA logistics yard at dawn. Alt text: “Dry van tractor-trailer at a Toronto-area freight yard, representing TDG-regulated trucking in Canada.” Title: “TDG Regulated Trucking Yard.” Caption: none (featured image only). Higgsfield prompt: “Realistic industrial freight photography: a clean white unmarked dry van tractor-trailer truck parked at a logistics yard loading dock in the Greater Toronto Area, Ontario, Canada, early morning golden light, wide asphalt yard, distant highway overpass, no people, no logos, no text, no visible license plates, no readable signage, professional commercial trucking photography, sharp focus, natural lighting.” Placement: featured image.
• Inline image 1: secured-drums-pallets-warehouse-packaging.png, 2560x1429px, PNG, strapped and shrink-wrapped drums on pallets in a warehouse. Alt text: “Secured drums and containers on pallets, illustrating TDG packaging and containment requirements.” Title: “Secured Dangerous Goods Packaging.” Caption: “Proper containment and securement are central to TDG packaging requirements.” Higgsfield prompt: “Realistic industrial warehouse photography: rows of secured steel drums and small plastic containers tightly strapped and shrink-wrapped on wooden pallets inside a clean modern warehouse, industrial shelving in soft-focus background, no people, no readable labels or text, no logos, no visible documents, natural warehouse lighting, professional commercial photography, sharp focus.” Placement: inline, in the “Packaging, Labels, and Placards” section.
• Inline image 2: cross-border-highway-trucking-canada-us.png, 2560x1429px, PNG, unmarked tractor-trailer on a highway near the border. Alt text: “Tractor-trailer on a Canadian highway, representing cross-border TDG compliance between Canada and the US.” Title: “Cross-Border Dangerous Goods Trucking.” Caption: “TDG reciprocity between Canada and the US covers training and most labels, with limited exceptions.” Higgsfield prompt: “Realistic trucking photography: a plain unmarked tractor-trailer truck traveling on a multi-lane Canadian highway near a border-adjacent landscape, overcast daytime sky, distant flat terrain, no people visible, no logos, no readable text or road signs, no license plates, professional commercial photography, sharp focus, natural lighting.” Placement: inline, in the “Crossing the Border” section.

Suggested designer-built assets: an infographic mapping the nine TDG hazard classes to their safety mark shapes and colours; a decision-tree graphic for “does my shipment qualify for an exemption”; a simple map showing the CANUTEC/ERAP escalation path from a roadside incident to Transport Canada notification.