1. WHMIS Facts about WHMIS and what it is:
Purpose: To reduce ill-health caused by hazardous materials in the workplace.
Legislation covering hazardous materials used in Canadian workplaces.
In Canada, labour and industry worked together with government to introduce this legislation.

2. WHMIS Requirements and MSDS:
WHMIS requires that suppliers of hazardous materials must label materials properly and include a Material Safety Data Sheet (MSDS) with the shipment.
The MSDS contains specific safety information for a product as required by legislation.
WHMIS requires that employers train all workers in the safe use and handling of hazardous materials, maintain inventories of hazardous materials, and ensure all materials are properly labelled with MSDS.

3. Hazardous materials (controlled products) covered by WHMIS include six classes:
compressed gas
flammable and combustible material
oxidizing material
poisonous and infectious material
corrosive material
dangerously reactive material

4. WHMIS Symbols
The WHMIS symbols standardize the labeling of dangerous material used in all workplaces, including schools. Pay careful attention to any warning symbols on the products or materials that you handle.

5. Class A: Compressed Gas
Class B: Flammable and combustible material
Class C: Oxidizing material

6. Class D: Poisonous and Infections Material
1. Material causing immediate and serious toxic effects
2. Material causing other toxic effects
3. Biohazardous infectious material

7. Class E: Corrosive material
Class F: Dangerously reactive material

8. Reading an MSDS Sheet
On the next pages you fill find an example of a Material Safety Data Sheet.
You will notice that this sheet is broken down into specific categories where you can find safety information.
All MSDS sheets must include this information, as required by WHMIS. Use the MSDS sheet provided to answer the following questions.

9. Hazardous Household Product Symbols (HHPS) – For the Home
It is important to identify the warning symbols that are placed on household products. You should be able to identify and understand each of the labels shown below

10. This symbol means the container is dangerous
This symbol means the container is dangerous. It can explode if heated or puncture causing flying bits of metal or plastic that can lead to serious injuries.
This symbol means the product inside the container is dangerous. The octagonal stop sign usually appears with one of three cautions.

12. Fill in the blanks for each picture by identifying if the symbols is part of WHMIS or HHPS, then correctly stating its name.
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14. Physical and Chemical Changes
Matter changes around us all the time.
Snow melts, cake batter gets baked, paper gets cut, etc.
There are two kinds of changes:
Physical and Chemical

15. Physical changes Changes in which no bonds are broken or formed.
The same types of compounds or elements (matter) that were there at the beginning of the change are there at the end of the change.
Many properties (such as color, boiling point, etc.) will also be the same because the substance is still the same
**If the same substance(s) is present before and after a change, it is a physical change**

16. Physical changes Example – Water
Water can be boiled to steam, or frozen into ice.
These are both physical changes because both steam and ice are still WATER, just in a different state (solid, liquid or gas)
The water molecule has not changed

17. Physical Changes Types of physical changes Changes of state
Physical deformation (cutting, denting, stretching)
Making solutions (dissolving a substance)
(like dissolving sugar or salt in water)
Often, these changes can be reversed

18. Chemical Changes
Chemical changes occur when bonds are broken and/or formed between molecules or atoms.
One substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
Chemical changes are frequently harder to reverse than physical changes.

19. Observations that indicate a chemical change has occurred include:
Temperature changes (either the temperature increases or decreases)
Light is given off
Unexpected color changes
Bubbles are formed (but the substance is not boiling)
A solid forms if two clear liquids are mixed