Where will you find a product's hazard class and category?
WHMIS: What WHMIS is
What the Workplace Hazardous Materials Information System is, its four main parts, how it lines up with the GHS, what counts as a hazardous product and which products are excluded.
- No sign-up
- Every answer explained
- Independent · not a government site
- 16 questions
- Topic drill
Study reference: CCOHS OSH Answers: WHMIS fact sheets (revised 2026-05-28), Ch. 1 WHMIS – General — What is WHMIS, main parts, products covered and excluded
All 16 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
Where will you find a product's hazard class and category?
- On the product's barcode
- Only on the purchase order
- In Section 2 of the SDS
- Only on the shipping invoice
An SDS lists an ingredient by a generic name instead of its exact chemical name. What does this usually mean?
- The product is only sold outside Canada and needs no full SDS
- The supplier forgot to finish the SDS
- The ingredient is not hazardous at all
- The supplier claimed it as confidential business information
Under WHMIS guidance, what is a consumer product?
- Any product a worker brings from home for lunch
- A product bought in a store and meant mainly for home use
- A product made by the employer for its own use
- A product sold only to licensed contractors
Which pair of products are both on the WHMIS exclusions list?
- Wood products and tobacco products
- Aerosols and compressed gases
- Acids and bases
- Paints and paint thinners
How does WHMIS define hazardous waste for the exclusions list?
- A hazardous product for recycling, recovery or disposal
- Any product kept in outdoor storage for more than 30 days
- Any container that is more than half empty
- Any product that has passed its expiry date
What does the acronym WHMIS stand for?
- Worksite Hazard Monitoring and Information Standard
- Workers' Health and Materials Inspection Service
- Workplace Health Management and Injury System
- Workplace Hazardous Materials Information System
Under WHMIS, when is a product called a "hazardous product"?
- When a worker reports feeling unwell after using it
- When it is sold in a container over 4 litres
- When it meets the criteria for a hazard class or category
- When it costs more than a set amount
Which of these products is excluded from WHMIS label and SDS requirements?
- A pest control product covered by the Pest Control Products Act
- A compressed gas cylinder delivered to a welding shop
- A corrosive drain cleaner sold to a factory
- A flammable solvent bought from an industrial supplier
Which list correctly names the main components of WHMIS?
- Labels, placards, shipping papers and manifests
- Ventilation, PPE, first aid kits, fire drills and evacuation
- Classification, labels, SDSs, and education and training
- Inspections, fines, permits and licensing
A product used at your job is exempt from WHMIS labels and SDSs. What must your employer still do?
- Get a Health Canada permit before using it
- Train workers on its health effects, safe use and storage
- Nothing, because exempt products carry no duties
- Write a full WHMIS supplier label for it
Under the GHS-aligned WHMIS, the physical hazard criteria are consistent with which other set of rules?
- Provincial building codes
- Transport of Dangerous Goods regulations
- Food and Drugs Act labelling rules
- Canada Consumer Product Safety Act rules
What is the main purpose of WHMIS?
- To give hazard and safety information about products used at work
- To inspect homes for unsafe cleaning products
- To set the prices of chemicals sold to Canadian businesses
- To license companies that transport dangerous goods by road and rail
Which of these is a benefit CCOHS lists for aligning WHMIS with the GHS?
- Workers no longer need site-specific training
- Suppliers may choose any SDS layout they like
- Standardized hazard and precautionary statements
- Hazardous products no longer need labels
WHMIS has been aligned with which worldwide hazard communication system?
- The Globally Harmonized System (GHS)
- The Transport of Dangerous Goods placard system
- The International Building Code (IBC)
- The ISO 9001 quality standard
Your workplace uses a store-bought glass cleaner every day. What does CCOHS say about training?
- No training is ever needed for store-bought products
- Workers should still be trained to use it safely
- Only supervisors need to know about it
- Training is needed only if a spill occurs
A workplace uses several products that meet WHMIS hazard criteria. What must be in place?
- A WHMIS program, including education and training
- Nothing, unless more than 20 workers are employed
- A permit from Health Canada for each product
- Only a sign at the entrance listing the products
What WHMIS is: key rules to remember
Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗
What is WHMIS?
- WHMIS = Workplace Hazardous Materials Information System.
- It is a Canada-wide system that gives health and safety information about hazardous products meant to be used, handled or stored in Canadian workplaces.
- WHMIS is aligned with the GHS (Globally Harmonized System of Classification and Labelling of Chemicals), the worldwide hazard communication system.
- Benefits of GHS alignment listed by CCOHS: more complete classification criteria (better at showing severity), new hazard classes, physical hazard criteria consistent with Transport of Dangerous Goods (TDG), standardized hazard and precautionary statements, standardized SDS format.
Main parts of WHMIS
- Four main components: hazard identification and product classification; labelling; safety data sheets (SDSs); worker education and training.
- Ontario's page puts it as three delivery methods: labels on containers, SDSs, worker education programs.
Products covered
- A product covered by the Hazardous Products Act that meets the criteria of any hazard class or category is a "hazardous product".
- All hazardous products used in the workplace are covered, and a WHMIS program with education and training must be in place.
- Suppliers compare their products to criteria in the Hazardous Products Regulations; hazardous products must be labelled and come with an SDS at time of sale.
- Hazard class and category appear in SDS Section 2 (Hazard identification) and on the supplier label.
Products not covered (exclusions)
- Explosives (Explosives Act); cosmetics, devices, drugs, food (Food and Drugs Act); pest control products (Pest Control Products Act); consumer products (Canada Consumer Product Safety Act); wood and wood products; radioactive nuclear substances (Nuclear Safety and Control Act); hazardous waste (sold for recycling/recovery or intended for disposal); tobacco and tobacco products; manufactured articles.
- Many of these are covered by other laws.
- Even when a product is exempt from WHMIS label/SDS rules, employers must still educate and train workers on health effects, safe use and storage.
Consumer products at work
- Consumer products: bought in a store, generally for home use (cleaners, adhesives, lubricants); labelled under other legislation.
- Workers should still receive education and training on safe use of these products.
Generic chemical identity on an SDS
- A generic chemical identity means the supplier applied to protect the exact ingredient as confidential business information (CBI); only Health Canada can approve a CBI claim.
Other topics
- WHMIS law and enforcementWHMIS 1988, WHMIS 2015 and the December 2022 amendments, the Hazardous Products Act and Regulations, who enforces WHMIS in each jurisdiction and what an inspector checks.
- Supplier, employer and worker dutiesWho counts as a supplier, manufacturer, importer or distributor, what employers must provide, what workers must do, and the role of the health and safety committee.
- WHMIS education and trainingThe difference between education and site-specific training, who must be trained, what it must cover, the four questions every worker should be able to answer, reviews and refreshers.
- Hazard groups, classes and categoriesThe physical and health hazard groups, how classes group similar products, how categories and types show severity, and what changed in the 2022 amendments.
- Physical hazard classesFlammables, oxidizers, gases under pressure, pyrophoric and self-heating products, water-reactives, organic peroxides, corrosive to metals, combustible dusts, simple asphyxiants and chemicals under pressure.
- Health hazard classesAcute toxicity, skin and eye damage, sensitizers, mutagens, carcinogens, reproductive toxicity, target organ toxicity, aspiration hazard and biohazardous infectious materials.
- WHMIS pictogramsThe red-bordered diamond pictograms described in words: flame, flame over circle, gas cylinder, corrosion, exploding bomb, skull and crossbones, health hazard, exclamation mark and the biohazard symbol, plus classes with no pictogram.
- Supplier labelsThe required parts of a supplier label, the two signal words, hazard and precautionary statements, bilingual rules, small-container exemptions and the 180-day update rule.
- Workplace labels and other identificationWhen a workplace label is needed (decanting, products made on site, lost labels), the decanting exceptions, what a workplace label must say, and other means of identification.
- Safety data sheets (16 sections)What an SDS is, the 16 sections in their required order, which sections workers use most, update rules, and the employer's duty to keep SDSs available.
- Safe handling and storageEveryday precautions by pictogram: ventilation, ignition sources, incompatibles, gas cylinders, corrosives, toxic products, storage height, cabinets and controls such as substitution and PPE.
- Emergencies, spills and first aidWhere emergency information is on the SDS, reporting leaks and spills, fire and evacuation basics, eyewash and showers, and standard first-aid steps by route of exposure.
- Ontario WHMIS rules (Regulation 860)How Ontario applies WHMIS through the Occupational Health and Safety Act and Regulation 860: who is covered, decanted containers, SDS access, annual review of training, exemptions and hazardous waste.