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2.8 (1) When dangerous goods meet the criteria for inclusion in more than one class but meet the criteria for inclusion in only one of the following classes, that one class is the primary class. The classes are
(a) Class 1, Explosives, except for the following dangerous goods for which Class 1 is a subsidiary class:
(i) UN3101, ORGANIC PEROXIDE TYPE B, LIQUID,
(ii) UN3102, ORGANIC PEROXIDE TYPE B, SOLID,
(iii) UN3111, ORGANIC PEROXIDE TYPE B, LIQUID, TEMPERATURE CONTROLLED,
(iv) UN3112, ORGANIC PEROXIDE TYPE B, SOLID, TEMPERATURE CONTROLLED,
(v) UN3221, SELF-REACTIVE LIQUID TYPE B,
(vi) UN3222, SELF-REACTIVE SOLID TYPE B,
(vii)UN3231, SELF-REACTIVE LIQUID TYPE B, TEMPERATURE CONTROLLED, and
(viii)UN3232, SELF-REACTIVE SOLID TYPE B, TEMPERATURE CONTROLLED;
(b) Class 2, Gases, and within this class, Class 2.3, Toxic Gases, takes precedence over Class 2.1, Flammable Gases, and Class 2.1, Flammable Gases, takes precedence over Class 2.2, Non-flammable and Non-toxic Gases;
(c) Class 4.1, Flammable Solids, desensitized explosives included in Packing Group I or self-reactive substances;
(d) Class 4.2, Substances Liable to Spontaneous Combustion, pyrophoric solids or liquids included in Packing Group I;
(e) Class 5.2, Organic Peroxides;
(f) Class 6.1, Toxic Substances, that are included in Packing Group I, due to inhalation toxicity;
(g) Class 6.2, Infectious Substances; and
(h) Class 7, Radioactive Materials.
If a substance meets the criteria for inclusion in more than one of the classes identified in subsection (1), the person doing the classification may seek assistance by contacting Transport Canada, Transport Dangerous Goods Directorate, through CANUTEC at 613-992-4624.
(2) Despite paragraph (1)(f), Class 8 is the primary class when a substance meets the criteria for inclusion in
(a) Class 8, Corrosives;
(b) Packing Group I due to inhalation toxicity of dusts or mists; and
(c) Packing Group III due to oral or dermal toxicity.
(3) A consignor must determine the order of precedence among classes that are not listed in subsection (1) in accordance with the following table, except that Class 6.1 takes precedence if a substance is a pesticide under the “Pesticide Act” and is included in Class 6.1, Packing Group III, and in Class 3, Packing Group III.
| Class | 4.2 | 4.3 | 5.1 | 5.1 | 5.1 | 6.1 | 6.1 | 6.1 | 6.1 | 8 | 8 | 8 | 8 | 8 | 8 | ||
| Packing Group | All | All | I | II | III | I | I | II | III | I | I | II | II | III | III | ||
| Code | D | O | X | X | L | S | L | S | L | S | |||||||
| 3 | I | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |||||||||
| 3 | II | 3 | 3 | 3 | 3 | 8 | 3 | 3 | |||||||||
| 3 | III | 6.1 | 6.1 | 6.1 | 3 | 8 | 8 | 3 | |||||||||
| 4.1 | II | 4.2 | 4.3 | 5.1 | 4.1 | 4.1 | 6.1 | 6.1 | 4.1 | 4.1 | 8 | 4.1 | 4.1 | ||||
| 4.1 | III | 4.2 | 4.3 | 5.1 | 4.1 | 4.1 | 6.1 | 6.1 | 6.1 | 4.1 | 8 | 8 | 4.1 | ||||
| 4.2 | II | 4.3 | 5.1 | 4.2 | 4.2 | 6.1 | 6.1 | 4.2 | 4.2 | 8 | 8 | 4.2 | 4.2 | 4.2 | 4.2 | ||
| 4.2 | III | 4.3 | 5.1 | 5.1 | 4.2 | 6.1 | 6.1 | 6.1 | 4.2 | 8 | 8 | 8 | 8 | 4.2 | 4.2 | ||
| 4.3 | I | 5.1 | 4.3 | 4.3 | 6.1 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | |||
| 4.3 | II | 5.1 | 4.3 | 4.3 | 6.1 | 4.3 | 4.3 | 4.3 | 8 | 8 | 4.3 | 4.3 | 4.3 | 4.3 | |||
| 4.3 | III | 5.1 | 5.1 | 4.3 | 6.1 | 6.1 | 6.1 | 4.3 | 8 | 8 | 8 | 8 | 4.3 | 4.3 | |||
| 5.1 | I | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | ||||||
| 5.1 | II | 6.1 | 5.1 | 5.1 | 5.1 | 8 | 8 | 5.1 | 5.1 | 5.1 | 5.1 | ||||||
| 5.1 | III | 6.1 | 6.1 | 6.1 | 5.1 | 8 | 8 | 8 | 8 | 5.1 | 5.1 | ||||||
| 6.1 | I | D | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
| 6.1 | I | O | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
| 6.1 | II | i | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
| 6.1 | II | D | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
| 6.1 | II | O | 8 | 8 | 8 | 6.1 | 6.1 | 6.1 | |||||||||
| 6.1 | III | X | 8 | 8 | 8 | 6.1 | 8 | 8 |
- Code D = dermal
- State: L = liquid
- O = oral
- S = solid
- i = by inhalation
- X = any route of exposure - D, O or i