CPR - WHMIS MSDS Range of Concentration of Ingredients

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WHMIS MSDS - Controlled Products Regulations: Range of Concentration of Ingredients (Section 11)

The legal text of the regulations in section 11 follows below:


CPR: Section 11, Subsection 1: Range of Concentration of Ingredients

For the purposes of this section, where the concentration of an ingredient of a controlled product or a complex mixture that is a component of a controlled product is expressed as a percentage, the percentage shall be an expression of the ratio of


  • (a) the weight of the ingredient or the complex mixture to the weight of the controlled product;


  • (b) the volume of the ingredient or the complex mixture to the volume of the controlled product; or


  • (c) the weight of the ingredient or the complex mixture to the volume of the controlled product.


CPR: Section 11, Subsection 2: Range of Concentration of Ingredients

Where the concentration of an ingredient of a controlled product or a complex mixture that is a component of a controlled product is required to be disclosed on a material safety data sheet and the ingredient or complex mixture is not always present in the same concentration in the controlled product, the material safety data sheet may disclose, in lieu of the actual concentration of the ingredient or complex mixture, that the ingredient or complex mixture falls within one of the ranges of concentration set out in subsection (3), where the actual concentration of the ingredient or complex mixture falls within that range.


CPR: Section 11, Subsection 3: Range of Concentration of Ingredients

For the purposes of subsection (2), the ranges of concentration are the following:


  • (a) from 0.1 to 1 per cent;


  • (b) from 0.5 to 1.5 per cent;


  • (c) from 1 to 5 per cent;


  • (d) from 3 to 7 per cent;


  • (e) from 5 to 10 per cent;


  • (f) from 7 to 13 per cent;


  • (g) from 10 to 30 per cent;


  • (h) from 15 to 40 per cent;


  • (i) from 30 to 60 per cent;


  • (j) from 40 to 70 per cent; and


  • (k) from 60 to 100 per cent.


CPR: Section 11, Subsection 4: Range of Concentration of Ingredients

If the concentration of an ingredient in a controlled product is not always the same, a material safety data sheet may disclose, in lieu of the actual concentration of an ingredient of a controlled product or of a complex mixture that is a component of a controlled product, a range of concentration other than a range set out in subsection (3) if the disclosed range of concentration falls entirely within a range of concentration set out in subsection (3).


CPR: Section 11, Subsection 5: Range of Concentration of Ingredients

Where the concentration of an ingredient of a controlled product or a complex mixture that is a component of a controlled product disclosed on a material safety data sheet is expressed as a percentage or in a range of concentration set out in subsection (3) or (4), the material safety data sheet shall also disclose which of the ratios set out in subsection (1) is being expressed.


SOR/2001-254, s. 3.


WHMIS MSDS Reference Manual - Section 11

Health Canada's WHMIS MSDS reference manual for section 11 is available at: WHMIS Requirements of the HPA and CPR, CPR Section 11. One of the important points they note is as follows:


"The use of "may contain" with respect to ingredient disclosure is not acceptable. The disclosure of ranges other than ranges specified in CPR 11(3) in respect of ingredients that are not subject to disclosure is outside of the scope of the HPA; e.g., (i) ingredients that do not fall within the criteria set out in paragraph 13(a) of the HPA or (ii) ingredient(s) that would be subject to disclosure but are present below the cut-off(s) established in section 4 of the CPR, {ref.: PIS No. 36}."


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Nexreg Compliance can author a WHMIS compliant Canadian MSDS for your product. For more information on Nexreg's WHMIS MSDS authoring services, please contact Nexreg Compliance or visit the following links:


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