WHMIS Is No Longer 2015: What Changed and Who Owns the Gap (2026)

If your training materials say "WHMIS 2015," they are out of date twice over. The year has been dropped from the name, and the amendments that replaced that version came fully into force on 14 December 2025.

The part that catches employers is who carries the consequence. If a supplier never updated their safety data sheet, the employer is still responsible for replacing that non-compliant document in the workplace library. You cannot point at the supplier and call it their problem.

What actually changed, and when

Canada's system has had three generations. WHMIS 1988 with its class letters and material safety data sheets. WHMIS 2015, which aligned with the fifth revision of the Globally Harmonized System, replaced MSDS with the sixteen-section SDS, and introduced the GHS pictograms.

Then on 15 December 2022 the Hazardous Products Act and Hazardous Products Regulations were amended to align with the seventh revised edition of GHS and certain provisions of the eighth. The national WHMIS resource confirms suppliers were granted a three-year transition period, which ended 14 December 2025.

Going forward, WHMIS is not referred to by any specific year. That is a small change with a practical use: any document, course or poster calling itself WHMIS 2015 was written before the amendments and should be checked rather than trusted.

During the transition, suppliers had to comply fully with either the old or the new requirements. Mixing elements of both was not permitted. That window has closed, and non-compliant safety data sheets or labels are now treated as violations under the Hazardous Products Act.

The employer owns the gap

This is the point most worth acting on, and it is easy to miss because it sits between two parties.

Canadian guidance on the amended regulations makes it explicit: if a supplier failed to update their SDS by the deadline, the employer is still responsible for replacing that non-compliant document in their workplace library. Employers cannot assume an older SDS remains current, and every document in the library needs verifying against the amended regulations.

That turns a supplier deadline into an employer audit task. Somebody has to go through the binder or the database and check each sheet, and an inspector can ask to see the result.

The practical starting point is an inventory. List every hazardous product actually in the building, including the ones in the back of the shop nobody has ordered in three years, then flag any SDS issued before the amendments came into force.

Products in the aerosol, flammable gas and pressurized categories are the highest priority, because those classifications changed. So is anything where the sheet is visibly old.

The classification changes that matter on a shop floor

Most of the amendments are technical and affect suppliers. Three are worth a worker or supervisor knowing.

Chemicals Under Pressure is a brand new physical hazard class, with its own label elements. Products that previously fell between categories now have a home, and the label on a familiar product may look different as a result.

Aerosols were renamed. The class was "Flammable Aerosols" and is now simply "Aerosols," with a new Category 3 covering non-flammable aerosols. A can that carried no flammability classification before may now be classified and labelled.

Water-reactive toxic gas now requires a hazard statement where a product releases toxic gas on contact with water. That is genuinely useful information for anyone working in wet conditions or responding to a spill.

Ingredient disclosure also expanded: all hazardous ingredients above the relevant cutoff must be listed, even where they do not contribute to the product's classification. For anyone selecting protective equipment against a specific substance, that is more information than the previous sheets carried.

Reading the sheet for the part that affects you

Sixteen sections is a lot to hand a worker, and in practice a few carry most of the operational value.

Section 2 gives the hazard identification: classification, pictograms, signal word and hazard statements. This is the fastest read for what the product can do to you.

Section 8 covers exposure controls and personal protection, and it is the section that should drive purchasing. It names exposure limits and the protection types appropriate to the product, which is where glove material, respirator type and eye protection get specified rather than guessed.

Section 4 is first aid measures, and it is the one to have read before the incident rather than during it. Our guide to CSA Z1220 first aid kit requirements covers what should be on site to act on it.

Section 9 was expanded by the amendments, and a sheet with a sparse Section 9 is a sign of an older document.

One honest caution about Section 8: it tells you the type of protection, not the specific product or the breakthrough time for your exact task. Our guide to choosing chemical resistant gloves covers why a glove chart cannot answer for a mixture, and why the SDS is a starting point rather than the whole selection.

Training is a separate obligation from the paperwork

Employer duties under WHMIS have three legs, and updating the SDS library only covers one.

Hazardous products used, stored, handled or disposed of in the workplace must be properly labelled. Safety data sheets must be made available to workers. And workers must receive education and training on safe storage, handling, use and disposal.

That training is workplace-specific as well as generic. A course explaining the pictograms is education; showing a worker where the SDS binder is, which products they handle, what the controls are and what to do in a spill is training. Inspectors can verify both.

Worth noting for anyone who did WHMIS training before the amendments: the pictograms and the sixteen-section structure are unchanged, so the core is still valid, but the classification changes and the new hazard class are not in that material.

Workplace labels matter too, and they are the ones most often missing. A decanted product in an unlabelled bottle is a WHMIS violation and a genuine hazard, because the person who filled it is not always the person who opens it.

What the SDS drives you to buy

The reason this is on a workwear site rather than a compliance one is that Section 8 is a purchasing document.

Glove material is the clearest case, since the right material against one substance is the wrong material against another, and permeation is invisible. Our guide to work gloves covers general hand protection, and the chemical selection logic is in the guide linked above.

Respiratory protection follows from the same section, and the distinction that matters is between a particulate filter and a chemical cartridge, and between air-purifying and supplied air. Our guide to respirator fit testing under CSA Z94.4 covers why a respirator that has not been fit tested is not protection.

Eye and face protection depends on whether the hazard is splash, vapour or dust, covered in our safety glasses guide. Skin and body protection may call for a changeable layer, covered in our comparison of coveralls and bib overalls.

Where flammability is part of the classification, the clothing question changes entirely, covered in our guide to arc rated and FR clothing under CSA Z462.

A practical review

Build the inventory first, because you cannot verify a library you have not listed.

Flag every SDS dated before December 2022, then request current versions from suppliers. Prioritize aerosols, gases and anything that might now fall under Chemicals Under Pressure.

Where a supplier cannot or will not provide a compliant sheet, that is a procurement decision as much as a compliance one, and switching to a supplier who maintains their documentation is a legitimate response.

Re-check workplace labels while you are in there, especially on decanted containers, and confirm the SDS access method actually works for the people on shift rather than only for the office.

Set a review cadence rather than treating this as a one-off. Reviewing safety data sheets at least every three years is a commonly recommended interval, and the system will keep evolving as the international framework is revised.

For the wider kit see the complete PPE checklist for Canadian workers, our guide to PPE requirements for Canadian construction sites, our guide to who pays for PPE in Canada and our guide to CSA certified versus CSA compliant.

Frequently Asked Questions

Is it still called WHMIS 2015?

No. The Hazardous Products Regulations were amended in December 2022 to align with GHS Revision 7 and parts of Revision 8, and going forward WHMIS is not referred to by a specific year. Any document or course still branded WHMIS 2015 predates those amendments and should be checked rather than assumed current.

When did the transition end?

14 December 2025. Suppliers had a three-year transition period from the amendments coming into force on 15 December 2022. That window has closed, and non-compliant safety data sheets or labels are now treated as violations under the Hazardous Products Act.

What if my supplier never updated their SDS?

The employer is still responsible for replacing the non-compliant document in the workplace library. You cannot rely on the supplier's failure as a defence. Where a supplier will not provide a compliant sheet, changing supplier is a reasonable response.

What are the main classification changes?

A new physical hazard class called Chemicals Under Pressure; the Aerosols class renamed from Flammable Aerosols with a new Category 3 for non-flammable aerosols; a required hazard statement where a product releases toxic gas on contact with water; and expanded ingredient disclosure covering hazardous ingredients above the cutoff even when they do not drive classification.

Which SDS sections matter most day to day?

Section 2 for hazard identification, Section 8 for exposure controls and personal protection, and Section 4 for first aid, which should be read before an incident rather than during one. Section 9 was expanded by the amendments, so a sparse Section 9 suggests an older document.

Does Section 8 tell me exactly which glove to buy?

Not exactly. It names the type of protection appropriate to the product, not a specific product or a breakthrough time for your particular task and duration. Treat it as the starting point for selection rather than the answer, particularly where you are handling a mixture.

This guide is general workplace safety information, not legal or regulatory advice. WHMIS supplier obligations fall under federal legislation while employer obligations are set by provincial, territorial and federal occupational health and safety law. Confirm your requirements with the authority that governs your workplace, and consult Health Canada for the current text of the Hazardous Products Regulations.