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Hazardous Products Regulations (SOR/2015-17)

Regulations are current to 2022-06-20 and last amended on 2020-03-18. Previous Versions

PART 7Physical Hazard Classes (continued)

SUBPART 17Combustible Dusts

Definition

Definition of combustible dust

 In this Subpart, combustible dust means a mixture or substance that is in the form of finely divided solid particles that, upon ignition, is liable to catch fire or explode when dispersed in air.

Classification in the Category of the Class

Marginal note:Category

 A combustible dust is classified in the category of this hazard class in accordance with the following table:

TABLE

Column 1Column 2
ItemCategoryCriteria
1Combustible Dusts — Category 1

A mixture or substance that

  • (a) has been shown to, upon ignition, catch fire or explode when dispersed in air or an other oxidizing medium; or

  • (b) is classified in a category of the hazard class “Flammable Solids” and 5.0% or more of its composition by weight is a flammable solid and has a particle size ≤ 500 µm

SUBPART 18Simple Asphyxiants

Definition

Definition of simple asphyxiant

 In this Subpart, simple asphyxiant means any gas that is liable to cause asphyxiation by the displacement of air.

Classification in the Category of the Class

Marginal note:Category

 A simple asphyxiant is classified in the category of this hazard class in accordance with the following table:

TABLE

Column 1Column 2
ItemCategoryCriteria
1Simple Asphyxiants — Category 1A gas that is a simple asphyxiant

SUBPART 19Pyrophoric Gases

Definition

Definition of pyrophoric gas

 In this Subpart, pyrophoric gas means any mixture or substance in a gaseous state that is liable to ignite spontaneously in air at a temperature of 54°C or less.

Classification in the Category of the Class

Marginal note:Category

 A pyrophoric gas is classified in the category of this hazard class in accordance with the following table:

TABLE

Column 1Column 2
ItemCategoryCriteria
1Pyrophoric Gases — Category 1A gas that is a pyrophoric gas

SUBPART 20Physical Hazards Not Otherwise Classified

Definition

Definition of physical hazard not otherwise classified

 In this Subpart, physical hazard not otherwise classified means a physical hazard presented by a product, mixture, material or substance that is different from any other physical hazard addressed by any other Subpart in this Part and that has the characteristic of occurring by chemical reaction and resulting in the serious injury or death of a person at the time the reaction occurs.

Classification in the Category of the Class

Marginal note:Category

 A product, mixture, material or substance is classified in the category of this hazard class in accordance with the following table:

TABLE

Column 1Column 2
ItemCategoryCriteria
1Physical Hazards Not Otherwise Classified — Category 1A product, mixture, material or substance that presents a physical hazard not otherwise classified

PART 8Health Hazard Classes

SUBPART 1Acute Toxicity

Definitions

Marginal note:Definitions

 The following definitions apply in this Subpart.

acute toxicant

acute toxicant means a mixture or substance that is liable to cause acute toxicity, or a mixture or substance that, upon contact with water, releases a gaseous substance that is liable to cause acute toxicity. (toxique aigu)

acute toxicity

acute toxicity refers to adverse effects occurring following

  • (a) oral or dermal administration of a single dose of a mixture or substance, or multiple doses given within 24 hours; or

  • (b) an inhalation exposure to a mixture or substance of four hours or of a duration that is converted to four hours in accordance with subsection 8.1.1(4). (toxicité aiguë)

dust

dust means solid particles that are suspended in a gas, usually air. (poussières)

mist

mist means liquid droplets that are suspended in the air. (brouillard)

Classification in a Category of the Class

Classification of Substances

Marginal note:LD50 or LC50 — associated range

  •  (1) An acute toxicant that is a substance is classified, with respect to each applicable route of exposure, in a category of this hazard class in accordance with the tables to subsection (3) if it has an LD50 by the oral or dermal exposure route, or an LC50 by the inhalation exposure route, that falls into one of the ranges indicated in the applicable table to that subsection.

  • Marginal note:Contact with water — gaseous substance

    (2) In addition to subsection (1), an acute toxicant that is a substance is classified with respect to the inhalation route of exposure in a category of this hazard class in accordance with Table 3 to subsection (3) if upon contact with water, it releases a gaseous substance that has an LC50 that falls into one of the ranges indicated in that table, unless that substance is already classified in a category of this hazard class for the inhalation route of exposure that represents a more severe hazard.

  • Marginal note:LD50 or LC50 not available

    (3) If an LD50 by the oral or dermal exposure route or an LC50 by the inhalation exposure route is not available, an acute toxicity point estimate must be established in accordance with the table to section 8.1.7, and the acute toxicant must be classified based on that acute toxicity point estimate, with respect to each applicable route of exposure, in a category of this hazard class in accordance with the following tables:

    TABLE 1

    Oral Exposure Route

    Column 1Column 2
    ItemCategoryRanges for LD50 or for Acute Toxicity Point Estimates (mg/kg body weight)
    1Acute Toxicity (Oral) — Category 1≤ 5
    2Acute Toxicity (Oral) — Category 2> 5 and ≤ 50
    3Acute Toxicity (Oral) — Category 3> 50 and ≤ 300
    4Acute Toxicity (Oral) — Category 4> 300 and ≤ 2000

    TABLE 2

    Dermal Exposure Route

    Column 1Column 2
    ItemCategoryRanges for LD50 or for Acute Toxicity Point Estimates (mg/kg body weight )
    1Acute Toxicity (Dermal) — Category 1≤ 50
    2Acute Toxicity (Dermal) — Category 2> 50 and ≤ 200
    3Acute Toxicity (Dermal) — Category 3> 200 and ≤ 1000
    4Acute Toxicity (Dermal) — Category 4> 1000 and ≤ 2000

    TABLE 3

    Inhalation Exposure Route

    Column 1Column 2Column 3Column 4
    Ranges for LC50 or for Acute Toxicity Point Estimates
    ItemCategoryGases (ppmV)Vapours (mg/l)Dusts and Mists (mg/l)
    1Acute Toxicity (Inhalation) — Category 1≤ 100≤ 0.5≤ 0.05
    2Acute Toxicity (Inhalation) — Category 2> 100 and ≤ 500> 0.5 and ≤ 2> 0.05 and ≤ 0.5
    3Acute Toxicity (Inhalation) — Category 3> 500 and ≤ 2500> 2 and ≤ 10> 0.5 and ≤ 1
    4Acute Toxicity (Inhalation) — Category 4> 2500 and ≤ 20 000> 10 and ≤ 20> 1 and ≤ 5
  • Marginal note:One-hour exposure period

    (4) For the purposes of Table 3 to subsection (3), the LC50 is based on a four-hour exposure period. If existing acute inhalation toxicity data have been generated according to a one-hour exposure period, the LC50 for gases and vapours must be divided by two, and the LC50 for dusts and mists must be divided by four.

Classification of Mixtures

Marginal note:Order of provisions

  •  (1) The classification of a mixture as an acute toxicant in a category of this hazard class must proceed in accordance with the order of sections 8.1.3 to 8.1.6.

  • Marginal note:Concentrations for the purpose of classification

    (2) Only ingredients present at concentrations equal to or greater than the concentration limit of 1.0% — w/w for solids, liquids, dusts, mists and vapours and v/v for gases — must be considered for the purpose of classification.

Marginal note:Data available for mixture as a whole

 If data of the types referred to in subparagraphs 2.1(a)(i) to (iv) are available for the mixture as a whole, the mixture must be classified as an acute toxicant in accordance with section 8.1.1.

Marginal note:Data available for use of bridging principles

 If data are available to enable the characterization of the mixture as an acute toxicant, in accordance with the bridging principles referred to in subsections 2.3(3) to (8), the mixture must be classified in a category of this hazard class in accordance with those subsections.

Marginal note:Data available for all ingredients

 If data are available for all ingredients in the mixture, the mixture must be classified as an acute toxicant in accordance with section 8.1.1 using the ATE of the mixture that is determined in respect of each applicable route of exposure by the following formula:

ATE subscript mix is equal to 100 divided by, opening square bracket, the summation, represented by the capital sigma symbol, from n, of the series capital C, subscript i, divided by ATE, subscript i, closing square bracket.

where

ATEmix
is the ATE of the mixture determined using this formula;
Ci
is the concentration of ingredient i;
n
is the number of ingredients and i is running from 1 to n;
ATEi
is the ATE of ingredient i, which is either
  • (a) the LD50 or the LC50 based on or converted to a four-hour exposure period, for i, or

  • (b) if the LD50 or the LC50 is unavailable, the acute toxicity point estimate established for i in accordance with the table to section 8.1.7; and

i
is each ingredient in the mixture with
  • (a) an ATE within the ranges set out in the applicable table to subsection 8.1.1(3),

  • (b) an oral or dermal LD50 greater than 2000 mg/kg body weight but less than or equal to 5000 mg/kg body weight, or

  • (c) an LC50 based on or converted to a four-hour exposure period within a range having an amplitude comparable to the one in paragraph (b).

Marginal note:Data not available for all ingredients

 If the ATE is not available for one or more ingredients of the mixture, the mixture must be classified as an acute toxicant in accordance with section 8.1.1 using the ATE of the mixture that is determined in respect of each applicable route of exposure according to the following:

  • (a) if data permit the ATE to be estimated for each of those ingredients in accordance with established scientific principles, the formula in section 8.1.5 must be used;

  • (b) if data do not permit the ATE to be estimated for an ingredient in accordance with established scientific principles, and the concentration of the ingredient in the mixture is equal to or greater than the concentration limit of 1.0%, the mixture is classified based only on the ingredients having an ATE, such that

    • (i) if the total concentration of all ingredients with unknown acute toxicity is less than or equal to 10.0% of the mixture, the formula in section 8.1.5 must be used, or

    • (ii) if the total concentration of all ingredients with unknown acute toxicity is greater than 10.0% of the mixture, the following formula must be used:

      ATE subscript mix is equal to the quotient of the numerator of 100 minus, opening parenthesis, the summation, represented by the capital sigma symbol, of the series capital C, subscript unknown, if the value of C is greater than 10.0%, closing parenthesis, divided by the following denominator: opening square bracket, the summation, represented by the symbol capital sigma, from n, of the series capital C, subscript i, divided by ATE, subscript i, closing square bracket.

      where

      ATEmix
      is the ATE of the mixture determined using this formula,
      Ci
      is the concentration of ingredient i,
      Cunknown
      is the concentration of ingredients i with unknown ATE values,
      n
      is the number of ingredients and i is running from 1 to n,
      ATEi
      is the ATE of ingredient i, which is either
      • (a) the LD50 or the LC50 based on or converted to a four-hour exposure period, for i, or

      • (b) if the LD50 or the LC50 is unavailable, the acute toxicity point estimate established for i in accordance with the table to section 8.1.7, and

      i
      is each ingredient in the mixture with
      • (a) an ATE within the ranges set out in the applicable table to subsection 8.1.1(3),

      • (b) an oral or dermal LD50 greater than 2000 mg/kg body weight but less than or equal to 5000 mg/kg body weight, or

      • (c) an LC50 based on or converted to a four-hour exposure period within a range having an amplitude comparable to the one in paragraph (b).

 
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