WHMIS Class E - Corrosive Material

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WHMIS - Controlled Products Regulations: Class E - Corrosive Material (Section 65)

The legal text of the regulations in section 65 follows below:

CPR: Section 65: Class E - Corrosive Material

A product, material or substance shall be included in Class E — Corrosive Material listed in Schedule II to the Act if

  • (a) it corrodes SAE 1020 steel or 7075-T6 non-clad aluminum surfaces at a rate exceeding 6.25 millimetres per year at a test temperature of 55°C when tested in accordance with Test Method, Laboratory Corrosion Testing of Metals for the Process Industries, NACE Standard TM-01-69 (1976 Revision);

  • (b) it is corrosive to skin when tested in accordance with OECD Test Guideline No. 404, “Acute Dermal Irritation/Corrosion”, dated May 12, 1981;

  • (c) it is included in Class 8 in Part III of the Transportation of Dangerous Goods Regulations;

  • (d) it is a gas included in Division 4 of Class 2 in Part III of the Transportation of Dangerous Goods Regulations;

  • (e) there is evidence that it causes visible necrosis of human skin tissue; or

  • (f) it is an untested mixture containing a product, material or substance that meets the criteria referred to in paragraph (b) or (e) and is present at a concentration of at least one per cent.

WHMIS MSDS Reference Manual - Section 65

Health Canada's WHMIS MSDS reference manual for section 65 is available at: WHMIS Requirements of the HPA and CPR, CPR Section 65. One of the important points they note is as follows:

"OECD Test Guideline No. 404 states that: "Strongly acidic or alkaline substances, for example, with a demonstrated pH of 2 or less or 11.5 or greater, need not be tested for primary dermal irritation, owing to their predictable corrosive properties". This infers that such substances may be viewed as corrosive based simply on a pH test and need not be subject to the full test in accordance with the guidelines. Therefore, (to avoid discrepancies in classifying controlled products) it is recommended that a product, material or substance with a demonstrated pH of 2 or less or 11.5 or greater be considered to be included in Class E, unless test data in accordance with OECD Guideline 404, or, as per subparagraph 33(3)(b)(v) of the CPR, any other test or method that is carried out in accordance with generally accepted standards of good scientific practice demonstrates this is not to be the case; {ref.: PIS No.60}."

Nexreg Compliance WHMIS Canadian MSDS Authoring Services

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:

Canadian Goverment Links

WHMIS MSDS NexregWiki Links

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