WHMIS
Chemical safety for cleaning work
WHMIS is the system for hazardous products used at work. For our team, that mainly
means knowing product labels, safety data sheets, PPE, storage, and what not to mix.
If a product is unlabeled, damaged, unfamiliar, or stronger than expected, stop and ask
before using it in a client's home.
Before Use
Check the product
- Use products from original containers with readable labels.
- Read the label signal words, pictograms, hazards, and first aid instructions.
- Confirm the product is appropriate for the surface and client request.
- Use gloves, eye protection, ventilation, or masks when the product calls for them.
- Know where the safety data sheet is kept or how to request it.
Stop Work
Ask first when something is off
- The label is missing, damaged, or not in English or French.
- The smell is unusually strong or causes coughing, burning, dizziness, or headache.
- A client-provided product has no instructions or looks repackaged.
- A spill is more than a small wipe-up or reaches skin, eyes, clothing, or carpet.
- You are not sure whether two products have already been mixed.
Cleaning Rules
Product handling habits
Do
- Keep containers closed when not in use.
- Carry products upright and secure them during travel.
- Wash hands after removing gloves.
- Ventilate bathrooms, kitchens, and small rooms when using strong products.
Do not
- Mix bleach with ammonia, vinegar, descaler, toilet cleaner, or unknown products.
- Use food or drink containers for cleaning products.
- Leave products where children, pets, or clients could trip over them.
- Ignore skin, eye, or breathing symptoms.
Official Source
Ontario WHMIS guide
The Ontario WHMIS employer guide explains employer duties for hazardous product labels,
safety data sheets, worker education, and workplace-specific training.
Open Ontario WHMIS employer guide
Skip to main content
