symbols & dangers. as you pursue more advanced science and chemistry, you will perform...
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Symbols & Dangers
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As you pursue more advanced science and chemistry, you will perform experiments and handle materials, equipment and chemicals.
It is crucial that you know and follow safety rules and procedures.
ALWAYS:Read the instructions first before starting
anythingWait for teacher approval to commenceWear appropriate and protective clothingAct responsiblyKnow your WHMIS symbols
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Why Bother? http://www.youtube.com/watch?
v=3jLGkmOVtnI
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It was his third day on the job, and a new worker was asked to pour a chemical product from a drum. While he was pouring the liquid, the drum exploded and the worker received third degree burns to 90% of his body. He was rushed to the hospital but he died the next day.
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What the worker didn't know:The chemical contained a hazardous
material called tolueneToluene can explode very easily. In this
case, it exploded because of the static electricity charge that was created when he poured the material into the drum.
Why did he not know it was a hazardous material? The container was not marked or labeled. He had not received any training. He did not know his rights and
responsibilities.
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CTV news 2012:“… An 18 year old high school student from
Mother Teresa Catholic High School succumbed to injuries he suffered from an explosion in his auto-shop class…. [The student] was not breathing and had no pulse when emergency workers arrived at the scene…. The students were working on a BBQ-related project when the explosion occurred…. It’s believed that fumes from the peppermint oil drum ignited and caused a flash explosion.”
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Health Canada has published standard rules to ensure individuals’ safety:
Workplace Hazardous Materials Information System
WHMIS
WHMIS symbols help you determine how to handle or dispose of a material safely
You must memorize them
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CLASS A: COMPRESSED GAS Gas at normal room temp and pressure
Contained under pressure (cylinder)
Dangers: Uncontrolled release Suffocation Frostbite
Examples: Oxygen Propane Helium
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CLASS B: FLAMMABLE & COMBUSTIBLE MATERIALS
Solids, liquids, and gases capable of catching fire in the presence of a spark or open flame
Dangers: Fire or Explosion
Examples:Diesel fuelKeroseneGasoline
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CLASS C: OXIDIZING MATERIALS
Chemicals that decompose readily to supply oxygen
Increase risk of fire if they come in contact with flammable or combustible materials
Dangers: Intensify fires and explosions
Examples:OzoneNitrogen dioxidePeroxides
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CLASS D: POISONOUS AND INFECTIOUS MATERIALS
Div 1. Materials Causing Immediate and Serious Toxic Effects
Materials can cause death or immediate injury when a person is exposed to small amounts
Examples: Carbon monoxide Cyanide Hydrogen sulphide
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CLASS D: POISONOUS AND INFECTIOUS MATERIALS
Div 2. Materials Causing Other Toxic Effects
Can cause life-threatening and serious long-term health problems
Less severe but immediate reactions in a person repeatedly exposed to small amounts
Examples: Asbestos Ammonia Mercury
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Div 3. Biohazardous Infectious Material
Organisms or toxins produced, that cause disease in people or animals Bacteria, Viruses, Fungi, Parasites
Examples: Hepatitis AIDS/HIV Salmonella
CLASS D: POISONOUS AND INFECTIOUS MATERIALS
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Can cause severe burns to skin and other tissues
Effects are permanent
Dangers: Corrosion of metals“Burning” human tissue
Examples:Hydrochloric acidSulfuric acid
CLASS E: CORROSIVE MATERIALS
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Unstable or highly reactive materials than can undergo extremely hazardous, uncontrolled reactions
Dangers: DecompositionPolymerizationReaction with waterSelf-reaction
Examples:Ethyl acrylate
CLASS F: DANGEROUSLY REACTIVE METALS
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Contains:WHMIS symbolsRisksConditions/Restrictions of the
productFirst Aid InstructionsCompany and company contacts
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WHMIS LABEL