Two main types of safety symbols

Transcription

1 ame: Date: Chemical Safety Symbols We use chemicals everyday in our homes, at school and in the workplace. List some examples of where you are likely to use hazardous (dangerous) chemicals and what kind of chemicals you might encounter. Where you might find hazardous chemicals In your house Examples of hazardous chemicals At school How do we know which chemicals are hazardous and which are safe? How do we know what are the hazards for each different kind of chemical? Answer: Two main types of safety symbols WHMIS Hazardous Household Product Symbols (HHPS) Detailed labeling system required for all hazardous chemicals used in schools and in the workplace in Canada Simple warning labels on commercial products like hair spray, household cleaners, etc.

2 (A) WHMIS stands for Workplace Hazardous Materials Information System A system designed to give students, workers and employers important safety, storage and handling information using: o WHMIS labels o Safety symbols o Material Safety Data Sheets (MSDS) All WHMIS controlled products fall into one or more of 6 classes of hazardous materials ame Symbol Risk(s) Example(s) CLASS A Compressed Gas CLASS B Flammable CLASS C Oxidizing Material CLASS D POISOOUS AD IFECTIOUS CLASS D3 CLASS D2 CLASS D1 Toxic (immediate) Toxic (long term) Biohazard CLASS E Corrosive CLASS F Dangerously Reactive

3 (B) Hazardous Household Product Symbols (HHPS) ot all products are controlled by WHMIS You will find other symbols on products purchased commercially for home use o Eg. hairspray, garden herbicides, cleaners For your safety, you should be able to recognize these symbols and understand what hazards they represent DAGER WARIG CAUTIO Explanation Poison Flammable Explosive Corrosive What do the different borders mean? octagon diamond Triangle

4 PRACTICE! 1) Match the letter and symbols below with correct definitions. There is only one best answer for each definition. A B C D1 D2 D3 E F i. This material could kill you if it is swallowed, inhaled, or absorbed through the skin. ii. Chemicals in this division won't kill you immediately, but could cause such unwelcome effects as birth defects in your children or liver damage. iii. The fact that most aerosol cans have propellants that can be ignited easily means that this symbol should be on their labels. iv. Industrial cleaners containing sodium hydroxide, a very corrosive base, should have this symbol on their label. v. Heating or dropping could cause these cylinders of pressurized gases to explode. vi. Some chemicals bearing this symbol could undergo a dangerous reaction if they come in contact with water. vii. Blood samples that have been contaminated by Hepatitis B viruses should be tagged with this symbol. viii. Since it poses such a fire hazard, a bottle of methanol would have this symbol on its label. ix. A chemical that causes cancer after prolonged and repeated exposure would get this symbol on its label. x. By releasing oxygen, can cause a flammable material to burn more easily. 2) What does WHMIS stand for? 3) ame 4 useful pieces of information that you should always check you on a WHMIS supplier label? 4) Do all products and chemicals have WHMIS labels? Explain.

5 5) The table below lists substances that you may find in your home. For each, predict if the substance needs a hazardous household product symbol and if so, which symbol(s) and border(s) it needs. Indicate your answers in the table using the letters associated with each symbol and border below. After you have made your predictions, see if you can find these items at home. Record your observations of the actual symbols and borders in the table. Symbols Borders A B C D D W C Predict Observe Substance Does it need a symbol? (Y or ) White- out or liquid paper Rat Poison Bleach Coke Cola Hair Spray Batteries Windshield washer fluid Glass cleaner Raw Chicken Propane Toilet Bowl Cleaner Furniture Polish Car Exhaust Spray paint

6 PRACTICE! SOLUTIOS 1) Match the letter and symbols below with correct definitions. There is only one best answer for each definition. A B C D1 D2 D3 E F i. This material could kill you if it is swallowed, inhaled, or absorbed through the skin. D1 ii. Chemicals in this division won't kill you immediately, but could cause such unwelcome effects as birth defects in your children or liver damage. iii. The fact that most aerosol cans have propellants that can be ignited easily means that this symbol should be on their labels. D2 B iv. Industrial cleaners containing sodium hydroxide, a very corrosive base, should have this symbol on their label. v. Heating or dropping could cause these cylinders of pressurized gases to explode. A E vi. Some chemicals bearing this symbol could undergo a dangerous reaction if they come in contact with water. vii. Blood samples that have been contaminated by Hepatitis B viruses should be tagged with this symbol. viii. Since it poses such a fire hazard, a bottle of methanol would have this symbol on its label. F D3 B ix. A chemical that causes cancer after prolonged and repeated exposure would get this symbol on its label. x. By releasing oxygen, can cause a flammable material to burn more easily. C D2 2) What does WHMIS stand for? _Workplace Hazardous Materials Information System 3) ame 4 useful pieces of information that you should always check on WHMIS supplier label? _Chemical name, WHMIS symbol, first aid infromation, and precautionary measures 4) Do all products and chemicals have WHMIS labels? Explain. _o, only hazardous chemicals for use in the workplace would get a WHMIS label.

7 5) The table below lists substances that you may find in your home. For each, predict if the substance needs a hazardous household product symbol and if so, which symbol(s) and border(s) it needs. Indicate your answers in the table using the letters associated with each symbol and border below. After you have made your predictions, see if you can find these items at home. Record your observations of the actual symbols and borders in the table. Symbols Borders P F E C D W C Substance White- out or liquid paper Does it need a symbol? (Y or ) Predict Observe Y F D Rat Poison Y P D Bleach Y C D Coke Cola Hair Spray Y F / E D / C Batteries Windshield washer fluid Glass cleaner Raw Chicken Y P / F D / D Propane Y F / E D / C Toilet Bowl Cleaner Furniture Polish Car Exhaust Y C D Y E / some F C / D Spray paint Y P / F / E D / D/ C