• Infectious substances, inhalation hazards, marine pollutants, and fumigants are among the other goods requiring special markings.
• Overpacks and radioactive materials must display certain labels or placards.

Category B infectious substances, UN3373

According to Canada’s Transportation of Dangerous Goods (TDG) Regulations, the Category B mark must be displayed, instead of the Class 6.2, Infectious Substances label, on a small means of containment containing infectious substances included in UN3373, BIOLOGICAL SUBSTANCE, CATEGORY B.

Toxic – inhalation hazard

A person must not import, offer for transport, handle, or transport dangerous goods included in Class 6.1, Toxic Substances unless the words “inhalation hazard” or “dangereux par inhalation” are displayed:

Marine pollutant mark

In addition to requirements for placards and UN numbers, the marine pollutant mark must be displayed in the following locations for dangerous goods that are marine pollutants in transport by vessel:

• On a small means of containment, next to the primary class label for dangerous goods or, if there is a subsidiary class label, next to the subsidiary class label; and
• On each side and each end of a large means of containment next to the placard required to be displayed for dangerous goods.

The marine pollutant mark is not required to be displayed when marine pollutants are:

• On board a road vehicle or railway vehicle on a ro-ro (roll-on/roll-off) ship; or
• Contained in:
  • A small means of containment and in a quantity less than or equal to 5 L for a liquid marine pollutant or 5 kg for a solid marine pollutant; or
  • A large means of containment and:
    • In a quantity less than or equal to 500 kg;
    • Transported by vessel on a domestic voyage; and
    • The large means of containment does not contain Class 1, Explosives, other than explosives included in Class 1.4, Class 5.2, Organic Peroxides, Class 6.1, Toxic Substances, or Class 7, Radioactive Materials.

The placard and UN number are not required to be displayed for substances identified as marine pollutants when display of the marine pollutant mark is not required.

Elevated temperature sign

In addition to requirements for placards and UN numbers, the elevated temperature sign must be displayed for dangerous goods contained in a large means of containment and offered for transport or transported at a temperature greater than or equal to:

• 100 degrees C if dangerous goods are in a liquid state, and
• 240 degrees C if dangerous goods are in a solid state.

The elevated temperature sign must be displayed on each side and each end of the large means of containment next to each primary class placard for dangerous goods or, if there is a subsidiary class placard, next to the subsidiary class placard.

Fumigation sign

If fumigation of a large means of containment is done using dangerous goods, the fumigation sign must be displayed at or next to each entryway through which a person can enter the large means of containment. The consignor must ensure that the fumigation sign is displayed by the person in charge of the fumigation and that the sign displays the name of the fumigant, date and time the fumigant was applied, and date of ventilation.

The fumigation sign must continue to be displayed on a large means of containment that has been fumigated until:

• The large means of containment has been ventilated to remove harmful concentrations of the fumigant, and
• The dangerous goods in the large means of containment during fumigation have been unloaded.

Overpacks

Safety marks on an overpack

If a safety mark is required to be displayed on a small means of containment and the small means of containment is inside an overpack, the person who prepares the overpack must display:

• The word “Overpack” or “Suremballage” in letters at least 12 mm high on a contrasting background, on at least one side of the overpack;
• The information required by Subsection (3) on one side of the overpack, if its capacity is less than 1.8 cubic meters (64 cubic feet); and
• The information required by Subsection (3) on two opposite sides of the overpack, if its capacity is greater than or equal to 1.8 cubic meters (64 cubic feet).

This does not apply if a safety mark for each class of dangerous goods inside the overpack is visible through the overpack.

The following information must be displayed on the overpack:

• The primary class label and each subsidiary class label for each of the dangerous goods contained in the overpack, except that only one label is required for dangerous goods included in the same class; and
• The shipping name and UN number of the dangerous goods.

If dangerous goods included in Class 7, Radioactive Materials, are transported in an overpack and a label is required to be displayed, the overpack must be prepared in accordance with Section 16(4) of the Packaging and Transport of Nuclear Substances Regulations.

Radioactive placards and labels

For dangerous goods included in Class 7, Radioactive Material, the label or placard required to be displayed must be determined in accordance with the Packaging and Transport of Nuclear Substances Regulations.

For dangerous goods included in Class 7, Radioactive Material, the following information must be determined in accordance with the Packaging and Transport of Nuclear Substances Regulations, and must be displayed on the primary class label for dangerous goods:

• The name or symbol of the radionuclide, except that if there is a mixture of radionuclides, the name or symbol of the most restrictive of the radionuclides in the mixture; and
• The activity and transport index of the dangerous goods.