Transportation of Dangerous Goods Regulations (SOR/2001-286)

Classifying Substances That Are Listed by Name in Schedule 1

2.3 If a name of dangerous goods is shown as a shipping name in column 2 of Schedule 1, that name must be used as the shipping name. That shipping name and the corresponding data for that shipping name in columns 1, 3 and 4 of Schedule 1 must be used as the classification of the dangerous goods.

Classifying Substances That Are Included in Only One Class and One Packing Group

2.4 If, in accordance with the criteria and tests in this Part, a substance is included in only one class and one packing group, the substance is dangerous goods and the shipping name in column 2 of Schedule 1 that most precisely describes the dangerous goods and that is most consistent with the class and the packing group determined by the criteria and tests must be selected as the shipping name. That shipping name and the corresponding data for that shipping name in columns 1, 3 and 4 of Schedule 1 must be used as the classification of the dangerous goods.

Classifying Substances That Are Included in More Than One Class or Packing Group

2.5 If, in accordance with the criteria and tests in this Part, a substance meets the criteria for inclusion in more than one class or packing group, the substance is dangerous goods and its classification is determined in the following manner:

• (a) the classes in which the dangerous goods are included are ranked in order of precedence in accordance with section 2.8 to determine the primary class and the potential subsidiary class or classes;

• (b) the potential packing group is the one with the lowest roman numeral;

• (c) the shipping name in column 2 of Schedule 1 that most precisely describes the dangerous goods and for which the corresponding data in columns 1, 3 and 4 are the most consistent with the primary class, the potential subsidiary class or classes and the potential packing group is selected; and

• (d) the shipping name and the corresponding data in columns 1, 3 and 4 of Schedule 1 are used as the classification of the dangerous goods.

Descriptive Text Following a Shipping Name

2.5.1 When applying section 2.4 or 2.5, the descriptive text written in lower case letters following a shipping name must be used in determining the shipping name that most precisely describes the dangerous goods.

Classifying a Mixture or Solution

2.6 A mixture or solution of substances that are not dangerous goods and one substance that is dangerous goods and that is listed by name in Schedule 1 has the classification shown for the dangerous goods in that Schedule if the mixture or solution is still dangerous goods in accordance with paragraph 2.1(a) and the mixture or solution is not identified by a shipping name in Schedule 1. However, if the classification for the dangerous goods does not precisely describe the mixture or solution but the mixture or solution meets the criteria in this Part for inclusion in at least one of the nine classes of dangerous goods, then sections 2.4 and 2.5 must be used to determine its classification.

2.7 [Repealed, SOR/2026-112, s. 42]

Precedence of Classes

• 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;

  • (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.

• (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	8	8	8

  Code:

  D = dermal

  O = oral

  i = by inhalation

  X = any route of exposure - D, O or i

  State:

  S = solid

  L = liquid