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U.S.-Canada Hazmat-Dangerous Goods Limited Quantity Exceptions Comparison Chart

This U.S.-Canada comparison chart shows how the two countries compare on their limited quantity exceptions.

United StatesCanada
RegulationLimited quantities exceptions 49 CFR 171.8 (definition of limited quantity) and:
? 173.306 - Class 2 (gases)
? 173.150 - Class 3 (flammable and combustible liquids)
? 173.151 - Class 4 (flammable solids)
? 173.152 - Class 5 (oxidizers and organic peroxides)
? 173.153 - Division 6.1 (poisons)
? 173.421 - Class 7 (radioactives)
? 173.154 - Class 8 (corrosives)
? 173.155 - Class 9 (miscellaneous)
? 173.63 (some exceptions for Class 1 materials; not identified as limited quantities, however)
Transportation of Dangerous Goods (TDG) Regulations, (SOR/2001-286), Section 1.17
Definition of limited quantitySmall amounts of hazardous materials in non-bulk packages; the maximum amount of a hazardous material for which there is a specific labeling or packaging exception.
Limited quantity exception can be used only if Column 8A of the Hazardous Materials Table references the section with the exception in Part 173.
A quantity of dangerous goods, other than explosives, is a limited quantity if:
? The dangerous goods are in one or more means of containment designed, constructed, filled, closed, secured and maintained so that under normal conditions of transport, including handling, there will be no accidental release of the dangerous goods that could endanger public safety; and
? The maximum weights and volume requirements for the material are met.
Except for Class 1 and 7, each combination package may not exceed 66 pounds (30 kg) gross weight.
The size of inner packagings that are allowed to be used varies depending on the hazard/division and packing group of the material (for example, Class 8 materials in packing group III must be in inner packagings not over 1.3 gallons (5 L) for liquids or not over 11 pounds (5 kg) for solids, packed in a strong outer packaging).
Limited quantity packaging must conform to the specifications, quantity and weight limits specified for each hazard class/division and packing group. These specifications will be listed in the section in Part 173 (listed in Column 8A of the Hazardous Materials Table) that is applicable to the material
Each outer means of containment has a gross mass that is less than or equal to 30 kg (66 lb) and the dangerous goods in the inner means of containment:
? If solids, have a mass that is less than or equal to the number shown in column 6(a) of Schedule 1, when that number is expressed in kilograms,
? If liquids, have a volume that is less than or equal to the number shown in column 6(a) of Schedule 1, when that number is expressed in litres, or
? If gases, including a gas in a liquefied form, are contained in one or more means of containment each of which has a capacity less than or equal to the number shown in column 6(a) of Schedule 1, when that number is expressed in litres.
Shipping papersIn most situations shipping papers are not required for a limited quantity of hazardous material. However, shipping papers are required for a limited quantity of a hazardous material that is a hazardous substance, hazardous waste, marine pollutant, or is offered/transported by air or water. When a shipping paper is required the words “Limited Quantity” or the abbreviation “Ltd Qty” must follow the basic description for the hazardous material. 1
MarkingsLimited quantity marking
Proper shipping name and ID number not required unless material is a hazardous substance or hazardous waste
Limited quantity marking1, 2
Markings – air“Y” limited quantity marking required
Proper shipping name and ID number required; the marking is allowed for all modes of transportation (but if other than by air, must still meet air transport requirements)
“Y” limited quantity marking required
1Part 3 (Documentation), Part 4 (Dangerous Goods Safety Marks), Part 5 (Means of Containment), Part 6 (Training), Part 7 (Emergency Response Assistance Plan) and Part 8 (Reporting Requirements) do not apply to the handling, offering for transport or transporting of limited quantities of dangerous goods on a road vehicle, a railway vehicle or a vessel on a domestic voyage if each means of containment is legibly and durably marked on one side, other than a side on which it is intended to rest or to be stacked during transport, with this marking.
2 When a limited quantity of dangerous goods is in a means of containment that is inside an overpack, the following information must be displayed on the overpack unless the marks on the small means of containment are visible through the overpack:
? The word “Overpack” or “Suremballage”; and
? The limited quantity marking legibly and visibly marked on a contrasting background.